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Effect of changing the background refractive index on the system resonance wavelength as observed in the curves of the transmission power spectral dependence
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This paper reports on the design of a multipurpose photonic device based on 2-D photonic crystals which uses Y couplers in its structure that is very efficient when employed as a switch in optical communication systems and possesses a very high sensitivity not only if used as a biophotonic sensor to detect refractive index changes but also as a pre...
Citations
... Фотонные кристаллы и фотонно-кристаллические волокна широко используются в сенсорике [8][9][10][11][12][13][14]. Они применяются для измерения температуры, показателя преломления среды, электрических и магнитных полей, механического напряжения, углов и т. д. ...
Представлены результаты численного моделирования оптических свойств одномерного (1D) фотонного кристалла с дефектом на основе слоев полупроводник-диэлектрик в ближнем ИК диапазоне. При моделировании использовались слои кремния и диоксида кремния с оптической толщиной 3λ/4, λ/4 и 10λ/4. Изучено влияние угла падения излучения на спектральное положение полосы пропускания дефекта. Показано, что чувствительность к углу поворота лежит в пределах 6-20 nm/deg и 1.7-5.5 dB/deg в зависимости от геометрии датчика и метода измерений. Это делает данные фотонные кристаллы перспективными для использования в датчиках угла поворота в качестве чувствительного элемента. Ключевые слова: датчик угла поворота, угол падения, фотонный кристалл, фотонная запрещенная зона, передаточная матрица.
... ФК и фотонно-кристаллические волокна широко используются в сенсорике [5][6][7][8][9][10][11]. ФК и волокна являются резонансными оптическими системами. ...
The results of computer simulation of optical properties of one-dimensional (1D) photonic crystal (PC) with defect, based on the layers Si-SiO2 in near IR range are presented. The optical thicknesses of layers, which form PC, were λ/4, 3λ/4 and 10λ/4. Defect was formed by air gap in the middle of PC. The influence of defect thickness on spectral position of the transmission band of defect was studied. It was shown that the sensitivity on the defect thickness d is in the range of Δλ/Δd = 330-1200 nm/μm and 0.6-0.85 dB/nm, depending on sensor geometry and measurement method. This makes 1D PC with defect promising for the use as sensitive element in sensors of small movements.
... Thus, various two-dimensional (2D) PhC structure (i.e. PhC-waveguide [7][8][9][10], PhC-resonator [11][12][13] and PhC-coupler [14] based optical sensors are already developed but their widespread use is limited due to intricate fabrication process [15][16][17]. Similarly, 2D-PhC fiber based structures are also explored to various applications like power splitter [18,19] and to detect various biochemical analytes [20][21][22][23][24] but these structures are not useful to develop integrated portable sensing modules. ...
In this paper, a multilayer one-dimensional photonic crystal (1D-PhC) based device is proposed for sensing applications. The structural design parameters are optimized to have good sensitivity along with low fabrication complexity. The proposed design is fabricated using Plasma-Enhanced-Chemical-Vapor-Deposition (PECVD) deposition technique followed by structural characterization. Finally, detailed sensing analysis of fabricated structure is carried out using in-house developed setup. The proposed structure demonstrates a 0.035 nm shift in reflected/transmitted wavelength with corresponding refractive index change of 10⁻³. Thus, showing it potential applications in integrated senor platforms.
