Pibin Bing

North China University of Water Conservancy and Electric Power | NCWU · Institute of Electric Power

The prognosis for cancer prevention and control is dire as it has emerged as one of the primary illnesses that poses a serious threat to human health. In 2022, the global number of new cancer cases will be 19.29 million, while the number of new cancer cases in China will be 4.57 million, accounting for 23.7 percent of the total number of new cancer...

In this paper, a tunable metasurface filter based on electrochemical metallization is proposed. The finite element method (FEM) is used to simulate the formation and rupture of the conductive filament (CF). The geometric structure of the metasurfaces filter is reconstructed by CF to achieve the purpose of tuning the transmission characteristics of...

A highly sensitive fiber optic refractive index (RI) sensor with low temperature cross-sensitivity is proposed and demonstrated. The RI sensitivity of Mach-Zehnder interferometer (MZI), which generated by the optical path difference between HE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> an...

This paper proposes a dual-channel high sensitivity photonic crystal fiber sensor with rectangular air holes, which can detect the refractive index of a single sample or detect the refractive index of two samples simultaneously, to increase the detection efficiency and wavelength sensitivity of the sample refractive index. The sensor can reduce the...

In order to achieve low refractive index detection in biomedical and material chemistry, a D-type microstructured optical fiber (MOF) sensor based on surface plasmon resonance (SPR) is proposed in this paper. The sensor uses gold nanofilm as sensing material between the core of the fiber and the plasma on the surface, and is coated at the open ring...

In order to achieve low refractive index detection in biomedical and material chemistry, a D-type microstructured optical fiber (MOF) sensor based on surface plasmon resonance (SPR) is proposed in this paper. The sensor uses gold nanofilm as sensing material between the core of the fiber and the plasma on the surface, and is coated at the open-ring...

A novel scheme that generates terahertz optical frequency comb (THz OFC) based on optimized cascaded difference frequency generation (OCDFG) with an aperiodically poled lithium niobate (APPLN) crystal is proposed. Two pump lasers initially generate cascaded optical waves by cascaded difference frequency generation (CDFG), the n multiple-frequency T...

In this paper, a photonic crystal fiber sensor is proposed for urine analysis of diabetic patients. Indium tin oxide (ITO) is adopted as plasmonic material to be coated on the polished plane to ensure a high flatness of the coating. The sensor is immersed in the liquid analyte for detection. Since the refractive index of the abnormal analyte is dif...

In this paper, an ultra-compact electrochemical metallization–based tunable filter with a simple metal–insulator–metal (MIM) waveguide system was proposed. The device comprises a MIM waveguide and a resonator with active electrodes. The formation and rupture of conductive filaments in the resonant cavity because of electrochemical metallization can...

We introduce an infrared laser generation scheme by cascaded difference frequency generation (CDFG) combined with optical parametric oscillator (OPO). An inventive infrared laser generator is proposed that enable cascaded optical waves, initially generated by CDFG in an aperiodically poled lithium niobate crystal, then continuously and repeatedly t...

Nonlinear optical frequency conversion technologies, including the optical parametric process and difference-frequency and sum-frequency processes, have demonstrated good performance for terahertz (THz) wave detection. The quantum efficiencies of the above technologies cannot break through the Manley–Rowe limit. In this work, we present a novel sch...

Terahertz (THz) metamaterial (MM) biosensors are a potential method of biomolecule detection. However, there have been few reports on the detection of trace proteins. In this study, we designed a novel THz biosensor consisting of graphene, polyimide (PI), and electromagnetically induced transparency-like (EIT-like) MMs for the ultra-sensitive detec...

A resistive switch effect-based optical memristive switch with an ultra-high extinction ratio and ultra-compact size working at 1550 nm is proposed. The device is composed of a metal–insulator–metal waveguide and a square resonator with active electrodes. The formation and rupture of conductive filaments in the resonant cavity can alter the resonan...

Resistive random-access memory (RRAM) is a new memory technology that can not only realize high-density storage, but also can simulate the neural synapse for use in artificial intelligence applications. In this study, we propose an RRAM device that shows competitive resistive memory characteristics and can similarly be used as a synapse in simulati...

In this work, we propose a novel dual optical frequency comb (DOFC) generation scheme based on dual cascaded difference frequency generation (DCDFG). Feasible designs are introduced that enable the two sets of cascaded optical waves, initially generated by DCDFG in an aperiodically periodically poled lithium niobate (APPLN) crystal with a pump wave...

We propose a nonlinear optical frequency conversion method based on cascaded difference frequency generation. Feasible designs are presented that enable the cascaded optical waves. They are initially generated by cascaded difference frequency generation with two pump waves, then transferred to high-order Stokes waves by optimized cascaded differenc...

In this paper, a dual-core microchannel-based fiber sensor is studied by using finite element method in the visible and near-infrared bands. Plasmonic material gold (Au) is deposited in microchannel to generate the surface plasmon resonance (SPR) effect, so that sensor can detect the change in RI of its surrounding analyte. Simulation results show...

The optical control ability of photonic crystal fiber (PCF) is a distinctive property suitable for improving sensing and plasma performance. This article proposes a dual-core D-channel PCF sensor that can detect two samples simultaneously, which effectively solves the problems of coating difficulty and low wavelength sensitivity. The PCF has four l...

We propose a novel scheme for terahertz (THz) wave generation by repeated and continuous frequency conversions from pump wave to high-order Stokes waves (HSWs). The repeated frequency conversions are accomplished by oscillations of Stoke waves in resonant cavity (RC) where low-order Stokes waves (LSWs) are converted to high-order Stokes waves again...

In this paper, a dual-core microchannel-based fiber sensor is studied by using finite element method in the visible and near-infrared bands. Plasmonic material gold (Au) is deposited in microchannel to generate the surface plasmon resonance (SPR) effect, so that sensor can detect the change in RI of its surrounding analyte. Simulation results show...

The overexpression level of Midkine (MDK) indicates the malignant degree of cancer cells, being a potential indicator and biomarker for cancer diseases. However, traditional biological methods such as Enzyme-Linked ImmunoSorbent Assay (ELISA) suffers inevitable disadvantages of long measurement time and false positive problems. In this study, the m...

The photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) technology has flexibility in birefringence, negative dispersion, effective area and nonlinearity and has become a widely studied new fiber. However, there are many problems in the practical application of the sensor, such as complex structure design, not easy to prepa...

High-efficiency terahertz (THz) wave generation with multiple frequencies by optimized cascaded difference frequency generation (OCDFG) is investigated at 100 K using a nonlinear crystal consisting of a periodically poled lithium niobate (PPLN) part and an aperiodically poled lithium niobate (APPLN) part. Two infrared pump waves with a frequency di...

A novel scheme for high-efficiency terahertz (THz) wave generation based on optimized cascaded difference frequency generation (OCDFG) with planar waveguide is presented. The phase mismatches of each-order cascaded difference frequency generation (CDFG) are modulated by changing the thickness of the waveguide, resulting in a decrement of phase mism...

We propose a high-efficiency scheme to generate THz waves combined with optimized cascaded difference frequency generation (OCDFG) and optical parametric oscillator (OPO) consisting of a periodic poled lithium niobate (PPLN) crystal or an aperiodic poled lithium niobate (APPLN) crystal at 100 K. The phase mismatches of the OCDFG are decreased in ca...

Photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) has broad application prospects in the detection of biological proteins, DNA/RNA, and toxic chemicals. However, there are many problems in application process, such as inhomogeneous metal nanofilm, low filling speed of analyte, and low detection efficiency, which limit the...

Photonic crystal fiber (PCF) sensors based on surface plasmon resonance (SPR) have the characteristics of high sensitivity, flexible structure, high nonlinear effect and high-quality transmission. However, in the application of PCF sensors, there are generally problems such as low detection efficiency, difficulty in coating air holes and complicate...

In this work, we propose a high-efficiency terahertz (THz) wave-generation approach by cascaded difference frequency generation (CDFG) with an aperiodically poled lithium niobate (APPLN) crystal at cryogenic temperature. The APPLN crystal with desirable poling periods along the crystal length determines phase mismatches of each-order CDFG, resultin...

A high-efficiency terahertz (THz) wave amplification approach by coupled cascaded optical parametric processes (CCOPP) with orientationally patterned gallium phosphide (OP-GaP) is introduced. The CCOPP comprises two cascaded optical parametric processes (COPP) which are intensely coupled by THz waves and cascaded optical waves via setting a precise...

A sensor based on D-shaped photonic crystal fiber (PCF) with elliptical holes is designed and numerical studied by finite element method (FEM). The refractive index (RI) of analyte can be detected by using surface plasma resonance effect and optical fiber with elliptical holes can solve the phase matching problem. The size of central hole, the majo...

Herein, novel hierarchical carbon layer-anchored WO3-x /C ultra-long nanowires were developed via a facile solvent-thermal treatment and a subsequent rapid carbonization process. The inner anchored carbon layers and abundant oxygen vacancies endowed the WO3-x /C nanowire electrode with high conductivity, as measured with a single nanowire, which gr...

Edge detection is the basis of image segmentation and object recognition, as edge generally contains important information of an object. In this paper, we propose a novel speckle-shifting ghost imaging (SSGI) method to extract the edge of an unknown object. In this method, the gradient operation is directly carried out to the illumination patterns...

The absorption characteristics of a photoexcited tunable perfect metamaterial absorber (PMA) at terahertz (THz) frequencies are analyzed based on the split-ring resonators (SRRs)-dielectrics-metallic structure, which are caused by different thicknesses and dielectric constants of polyimide, cell sizes and widths of SRRs, and lengths and conductivit...

Cascaded optical parametric processes based on periodically poled KTiOPO4 (PPKTP) generating a tunable terahertz (THz) wave are analyzed. The forward and backward cascaded optical parametric processes are theoretically analyzed. Tuning characteristics of the THz wave that relate to the parameters of the pump wavelength and the grating period of PPK...

We present a theoretical research concerning simultaneous generation of two terahertz (THz) waves with bulk LiNbO3 and four THz waves with periodically poled LiNbO3 (PPLN) by coupled optical parametric generation (COPG). First, we investigate collinear phase matching of COPG generating two orthogonally polarized THz waves with two types of phase ma...

In recent years, the primal-dual hybrid gradient (PDHG) method has been widely used. However, the original PDHG method may diverge without additional conditions. Here we propose a convergent prediction-correction PDHG (PD-PDHG) method for canonical convex programming with linear constraints. The most important characteristic of the PD-PDHG method i...

In this work, we theoretically analyze the generation of two parallel polarized terahertz (THz) waves from coupled optical parametric oscillations (OPOs) with periodically-inverted GaAs by stimulated polariton scattering (SPS). We analyze collinear phase-matching (CPM) conditions for bulk GaAs generating a THz wave and quasi-phase-matching (QPM) co...

Terahertz (THz) wave generation from zinc-blende crystal waveguide, such as GaAs, InP, ZnTe and CdTe, at polariton resonance region (PRR) with a transverse pumping geometry is investigated. It is shown that by using grating vector of periodically inverted crystal, THz wave can be efficiently generated by difference frequency generation (DFG) with a...

We present a theoretical investigation on simultaneous generation of two pairs of Stokes and terahertz (THz) waves from coupled optical parametric oscillations (OPOs) with a quasi-phase-matching (QPM) scheme. The two pairs of Stokes and THz waves are generated by stimulated polariton scattering (SPS) from periodically-inverted GaP. By analyzing the...

We present a theoretical investigation of the simultaneous generation of two orthogonally polarized terahertz (THz) waves by stimulated polariton scattering (SPS) with a periodically poled LiNbO3 (PPLN) crystal. The two orthogonally polarized THz waves are generated from SPS with A1 and E symmetric transverse optical (TO) modes in a LiNbO3 crystal,...

The characteristics of the dual-core photonic crystal fiber (PCF) sensor are studied using the finite element method (FEM), and the structure is improved according to the numerical simulation results. The results show that whether or not the four large air holes far away from the geometry center of the PCF are filled with analyte has no influence o...

Edge detection is one of the most important tools to recognize the features of an object. In this paper, we propose an optical edge detection method based on computational ghost imaging (CGI) with structured illuminations which are generated by an interference system. The structured intensity patterns are designed to make the edge of an object be d...

Stimulated polariton scattering from the B1-symmetry modes of a KNbO3 crystal to generate a terahertz wave (THz-wave) with a noncollinear phase-matching scheme is investigated. The frequency-tuning characteristics of the THz-wave by varying the phase-matching angle and pump wavelength are analyzed. The expression for the effective parametric gain l...

In recent years, the primal-dual hybrid gradient (PDHG) method has been widely used. However, the original PDHG method may diverge without additional conditions. Here we propose a convergent prediction-correction PDHG (PD-PDHG) method for canonical convex programming with linear constraints. The most important characteristic of the PD-PDHG method i...

Terahertz (THz) wave generation by periodically poled BaTiO_3 (PPBT) with a quasi-phase-matching (QPM) scheme based on cascaded difference-frequency generation (DFG) is theoretically analyzed. The cascaded DFG processes comprise cascaded Stokes and anti-Stokes processes. The calculated results indicate that the cascaded Stokes processes are stronge...

Accurate calculation of shear strength of reinforced concrete (RC) circular columns plays a key role in the ductile seismic design, which can effectively prevent the occurrence of brittle shear and flexure-shear failure. Based on the existing quasi-static test results of RC circular columns, the seismic failure modes and the method for determining...

The absorption characteristics of a photoexcited metamaterial absorber at terahertz frequencies were analyzed in this study. Filling photosensitive semiconductor silicon into the gap between the resonator arms leads to modulation of its electromagnetic response through a pump beam which changes conductivity of silicon. Comparisons of terahertz abso...

The augmented Lagrangian multiplier method (ALM) is a highly influential method for optimization problems, and it has been successfully applied in various fields, such as compressive sensing, matrix completion, and image recovery. However, its efficiency is dominated by how to efficiently solve the involved subproblem, which is often as hard as the...

Terahertz (THz) wave generation by organic crystal 2-[3-(4 -hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene]malononitrile (OH1) with a collinear phase-matching scheme based on cascaded difference frequency generation(DFG) processes was theoretically analyzed. The cascaded Stokes interaction processes and the cascaded anti-Stokes interaction process...

Terahertz parametric oscillator (TPO) using KTiOPO4 (KTP) crystal with a noncollinear phase-matching scheme is investigated. Frequency tuning characteristics of terahertz wave (THz-wave) by varying the phase-matching angle and pump wavelength are analyzed. The expression of the effective parametric gain length under the noncollinear phase matching...

Terahertz (THz) generation by a GaP ridge waveguide with a collinear modal phase-matching scheme based on cascaded difference frequency generation (DFG) processes is theoretically analyzed. The cascaded Stokes interaction processes and the cascaded anti-Stokes interaction processes are investigated from coupled wave equations. THz intensities and q...

Terahertz (THz) wave generation by organic crystal 4-N, N-dimethylamino-4′-N’-methyl-stilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS) with a collinear phase-matching scheme based on cascaded difference frequency generation (DFG) processes is theoretical analyzed. The cascaded Stokes interaction processes and the cascaded anti-Stokes interaction...

Objective: In order to provide the theoretical basis for training planning and decision making through the research on the relationship between enterprise training investment and enterprise performance. Method: The questionnaire survey was adopted to conduct on 56 research samples to draw a conclusion through the analysis of per capita training cos...

Objective: In order to study the characteristics of China's new generation of knowledge workers and analyze its incentive factors, and explore effective strategies to better improve the incentive mechanism and employee loyalty and promote the stable development of the enterprises. Methods: the motivation factors of new generation of knowledge worke...

A surface plasmon resonance biosensor based on large size square-lattice photonic crystal fiber has been designed and simulated by finite element method. The square-lattice airholes are first coated with a calcium fluoride layer to provide mode confinement, then a nanoscale gold layer is deposited to excite the plasmon mode, and finally, the sample...

A surface plasmon resonance biosensor based on three-hole photonic crystal fiber is analyzed. The holes of the three-hole photonic crystal fiber are coated with a lower index calcium fluoride layer and a nanoscale gold layer. Three relatively large size holes should facilitate the fabrication of the inclusions and the infiltration of the analyte. N...

This paper proposes a simple alternating direction method (ADM) for separable convex programming, which is a modification of the classical ADM by performing an additional correction step, and thus it includes the latter as a special case. A prominent character of the new method is that its step-length is a constant, and then the increased computati...

Terahertz (THz) wave generation at polariton resonance of MgO:LiNbO3 with a surface-emitted configuration is investigated. It is shown that by using crystal birefringence of bulk MgO:LiNbO3 crystal THz wave can be efficiently generated by difference frequency generation (DFG) in the vicinity of polariton resonances with Cherenkov phase matching sch...

Terahertz (THz) wave generation from bulk and periodically poled LiTaO3 (PPLT) with a Cherenkov phase matching scheme is numerically investigated. It is shown that by using the crystal birefringence of bulk LiTaO3 and a grating vector of PPLT, THz waves can be efficiently generated by difference frequency generation (DFG) with a Cherenkov phase mat...

Terahertz wave (THz-wave) parametric oscillations with a noncollinear phase-matching scheme at polariton resonance using a MgO : LiNbO 3 crystal with a surface-emitted configuration are investigated. We investigate frequency tuning characteristics of a THz-wave via varying the wavelength of the pump wave and phase-matching angle. The effective para...

The frequency mixing effects in terahertz parametric oscillator (TPO) with a noncollinear phase-matching scheme based on bulk lithium niobate (LiNbO3), including sum frequency generation (SFG), difference-frequency generation (DFG), optical parametric oscillation and cascaded optical processes are investigated. The analysis results indicate that th...

Cascaded optical parametric processes in terahertz parametric oscillator with a noncollinear phase-matching scheme based on bulk lithium niobate were observed. The spectra of the first-, second-, and third-order Stokes waves were observed. By analyze the spectra of the first-, second-, and third-order Stokes waves it is found that the frequency dif...

Terahertz parametric oscillator (TPO) using GaP as gain medium with a noncollinear phase-matching scheme is investigated. Frequency-tuning characteristics of the terahertz wave (THz-wave) by varying the phase-matching angle and pump wavelength are analyzed. Gain and absorption characteristics of the THz-wave are investigated. The characteristics of...

Terahertz parametric oscillator (TPO) using periodically inverted GaP stacks (PIGaPS) as gain medium with a quasi-phase-matching scheme is investigated. The frequency tuning characteristics of terahertz wave (THz-wave) are analyzed by varying the grating period of PIGaPS and the pump wavelength. Gain and absorption characteristics of THz-wave are a...

The analytical expressions of the parametric gain for the terahertz wave (THz-wave) and the Stokes wave of THz-wave parametric oscillator (TPO) with a quasi-phase-matching scheme in periodically poled LiNbO3 (PPLN) are deduced. The pump threshold expression of the TPO with a quasi-phase-matching scheme in PPLN is derived based on the gain expressio...

Collinear interaction of pump wave, Stokes wave and terahertz wave was proposed in this letter to solve the problem of intense absorption of terahertz wave in gain medium in terahertz parametric oscillation. The amplification characteristics of forward and backward terahertz wave were theoretically analyzed by solving coupled wave equations under d...

The effects of metallic nanofilms on sensing characteristics properties of photonic crystal fiber (PCF) sensor with large size microfluidic channels were studied by the full-vector finite element method (FEM). Aimed at large size microfluidic channels PCF sensing model, the absorption characteristics of the metallic nanofilms with different thickne...

A high-powered tunable terahertz wave (THz-wave) has been parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO) pumped by a multi-longitudinal-mode Q-switched Nd:YAG laser. The effective parametric gain length was enlarged by employing two MgO:LiNbO3 crystals. The tunable THz-wave radiation from 0.8 to 2.8 THz was real...

Cascaded optical parametric oscillations generating a tunable terahertz (THz) wave are analyzed to solve the problem of low quantum conversion efficiency in a THz-wave parametric oscillator. The forward and backward optical parametric processes are theoretically analyzed based on periodically poled lithium niobate (PPLN) as an example. Tuning chara...

A surface plasmon resonance biosensor based on three-hole photonic crystal fiber (PCF) is analyzed by the finite element method. The results demonstrate that the biosensor will exhibit different loss spectra characteristics under the conditions of nonuniform thicknesses of the auxiliary dielectric layer, the gold layer, and the biolayer in the thre...

A novel mechanism of cascaded parametric oscillation is proposed in this paper to solve the problem of low-efficiency in terahertz (THz) parametric oscillation. The cascaded parametric oscillation is theoretically analyzed based on PPLN crystal as an example. The tuning characteristics of the THz wave, which are affected by the parameters of pump w...

High-power tunable terahertz wave (THz -wave) radiation was parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO) pumped by a multi-longitudinal-mode Q-switched Nd:YAG laser. The effective parametric gain length under the condition of noncollinear phase matching was calculated to optimize the parameters of TPO. The THz...

Frequency tuning characteristics of a THz-wave by varying phase-matching angle and pump wavelength in a noncollinear phase-matching THz-wave parametric oscillator (TPO) are analyzed. A novel scheme to realize the tuning of a THz-wave by moving the cavity mirror forwards and backwards is proposed in a noncollinear phase-matching TPO. The parametric...

Based on the plane wave expansion method research IV, III-V and II-VI semiconductor material composition family 2d triangle photonic crystal lattice terahertz band state density of characteristics, numerical simulation to get IV family in filling SiC rate f=0.8 form 0.037 THz band gap width, II-VI ZnO family in filling rate f=0.73 form 0.0417 THz b...

A high-powered pulsed terahertz (THz)-wave has been parametrically generated via a surface-emitted THz-wave parametric oscillator (TPO). The effective parametric gain length under the noncollinear phase matching condition was calculated for optimization of the parameters of the TPO. A large volume crystal of MgO:LiNbO3 was used as the gain medium....

A novel surface -emitted intracavity THz-wave parametric oscillator (TPO) was designed to improve the down-conversion efficiency. An intersecting cavity geometry was employed that allowed the nonlinear medium to be placed within the cavity of the pump laser. The surface-emitted scheme was employed to extract the THz-wave from MgO:LiNbO3 crystal. Th...

A photonic crystal fiber based surface plasmon resonance (PCF-SPR) sensor is simulated by finite element method and experimentally realized. The calculations show that there is an obvious loss peak in the vicinity of 1.2 m while the PCF of LMA-8 is used as a sensor. The suspension of silver nanoparticle mixed with hexadecyl trimethyl ammonium bromi...

Band gap of three-dimension photonic crystals with the group IV, III-V, II-VI and IV-VI semiconductor material were calculated by plane wave expansion method(PWM). The best ratio of radius to lattice constant and the maximum complete band gap were calculated. The results showed that they have wide photonic band gaps with group III-V semiconductor m...

One major research direction in modern photonics and nano-optics is the theoretical and experimental investigations of new types of guided electromagnetic waves that can be used for the development of subwavelength waveguides and interconnectors that overcome the so-called diffraction limit of light. Surface plasmon polaritons are among the most pr...

A Photonic Crystal Fiber based on Surface Plasmon Resonance (PCF-SPR) temperature sensor with liquid core is proposed in this paper. Glycerin liquid with a high refractive index is filled in the central air hole of the hollow core photonic bandgap (PBG) PCF, the transmission type of PCF will change to total internal reflection (TIR), which will sig...

High-efficient THz-wave radiation is achieved from a Si-prism coupler THz-wave parametric oscillator via a block of MgO: LiNbO 3. The THz-wave radiation from 0.95 THz to 2.10 THz is obtained. The average power of THz-wave is 580 nW and the output energy of Stokes wave is 2.7 mJ at 1.8 THz when the pump energy is 101 mJ, corresponding to the THz-wav...

The characteristics of noncollinear phase matching and quasi-phase-matching in the THz-wave parametric oscillator (TPO) are investigated. The expression of the effective parametric gain length under the condition of noncollinear phase matching configuration is deduced. The relationship between the poling period of periodically poled LiNbO3 crystal...

A surface-plasmon-resonance (SPR) sensor based on photonic-crystal-fiber (PCF) with large size microfluidic channels is proposed. The size of the microfluidic channels with gold coating can be enlarged by reducing the number of the holes in the second layer, so the structure of the PCF is simple and easy to manufacture. It is propitious for metal c...

High-power nanosecond pulsed THz-wave radiation is achieved via a surface-emitted THz-wave parametric oscillator. One MgO:LiNbO3 crystal with large volume is used as the gain medium. THz-wave radiation from 1.084 THz to 2.654 THz is obtained. The maximum THz-wave average power is 5.8 μW at 1.93 THz when the pump energy is 84 mJ, corresponding to a...

In this paper, we propose a novel high birefringent terahertz (THz) photonic crystal fiber (PCF) with subwavelength circular air hole pairs in the core which are arranged as a hybrid crystal lattice structure. And its high mode birefringence is realized by reducing structure symmetry in core. A professional software COMSOL Multiphysics 4.0 is used...

Tunable high-power THz-wave radiation is achieved via a compact eudipleural THz-wave parametric oscillator. The maximum THz-wave output is 1.164 V at 1.755 THz when the pump energy is 90mJ. In the experiments we find that the maximum output of THz-wave moves to the high frequency band as the pump energy increases and this phenomenon is reasonably e...

We report a pulsed surface-emitted THz-wave parametric oscillator based on two MgO:LiNbO3 crystals pumped by a multi-longitudinal mode Q-switched Nd:YAG laser. Through varying the phase matching angle, the tunable THz-wave output from 0.79 THz to 2.84 THz is realized. The maximum THz-wave output was 193.2 nJ/pulse at 1.84 THz as the pump power dens...

High-power nanosecond pulsed terahertz (THz)-wave radiation is achieved via a surface-emitted MgO:LiNbO3 terahertz parametric oscillator (TPO). THz-wave radiation from 0.8 THz to 2.8 THz is obtained. The maximum THz-wave output is 173.9 nJ per pulse at 1.73 THz while the pump power density is 197.4 MW/cm2. The corresponding energy conversion effici...

Optical fiber surface enhanced Raman scattering (SERS) sensors, which achieve optical fiber sensing based on SERS effect, have several particular advantages. However, the use of conventional fiber has brought optical fiber SERS sensors some drawbacks, such as background absorption and interference, fluorescence effect and Raman scattering from the...

In this paper, we propose a novel high birefringent terahertz (THz) photonic crystal fiber (PCF) with subwavelength circular air hole pairs in the core which are arranged as a hybrid crystal lattice structure. And its high mode birefringence is realized by reducing structure symmetry in core. A professional software COMSOL Multiphysics 4.0 is used...