High Sensitivity to Salinity-Temperature Using One-Dimensional Deformed Photonic Crystal

Abstract

This paper aims to theoretically study the concept of a photonic salinity and temperature sensor according to a deformed one-dimensional photonic structure. The fundamental capability of the proposed sensor is studied. Simultaneously we search to optimize the thickness of the structure and to get the maximum salinity and temperature sensitivity. The structure is constructed by alternating layers of TiO2 and fused-silica P times. In the middle of the structure, a cavity containing seawater is inserted to measure its salinity and temperature. The transfer matrix method (TMM) is used to simulate the wave-transmittance spectra. It is shown that the quality factor (Q-factor) of the resonance peaks depends on the number (P) of layers. After that, the thickness of the layers is deformed by changing the deformation degree (h). The parameters P and h are optimized to get the maximal Q-factor with the minimal number of layers and structure thickness. The best sensitivity SS of the proposed salinity sensor is 558.82 nm/RFIU with a detection limit of 0.0034 RFIU. In addition, the best sensitivity ST of the designed temperature sensor is 600 nm/RFIU with a detection limit of 0.0005 RFIU.

A 1064 nm laser adaptive limiter with visible light transparency based on one dimensional photonic crystals of LiNbO3 defects

“…17–20 Compared with two and three dimensional photonic crystals, one dimensional photonic crystals have been used in a wide range of applications such as optical sensors, optical switches, optical limiters, temperature sensors, and omni-directional high reflectors owing to their facile fabrication. 21–24 One dimensional photonic crystals, when employed as optical limiters, are nanoscale periodic optical structures capable of controlling and manipulating light, similar to the way semiconductors control electrons. 25 The characteristics of one dimensional photonic crystals exhibit considerable variation through manipulation of materials properties, including refractive index, layer count, and layer thickness.…”

Analysis of 1 Dimensional Photonic Crystal Optical Limiters

“…These robust 1D photonic crystal structures lead to various applications such as optical sensors, optical switches, optical limiters, temperature sensors, omnidirectional high reflectors, etc. [12,[21][22][23] Metallic nanocomposites composed of semiconductors chalcogenides photonic crystals are kept inside mind and is best suited for optical switching and limiting applications [24,25] .However, photonic crystals consisting of superconductors and dielectric materials [26][27][28][29][30] find wide applications in biosensing [22] , temperature measurement [20] , bio photonics due to their wider bandwidth, smaller dielectric losses and negligible degradation. and gas sensors and sea water devices that measure desertification and seawater salinity, etc.…”

“…and gas sensors and sea water devices that measure desertification and seawater salinity, etc. [22,23] The performance of photonic crystals changes greatly by changing device parameters such as refractive index. of materials, number of layers, thickness of each layer.…”