T Grating on Nano-Cavity Array based Refractive Index Sensor
Optics
2021-08-03 v3 Applied Physics
Abstract
We report a refractive index sensor comprising of unique T grating on top of periodic nano-cavities. The sensor has two resonant modes sensitive to different regions of the structure with low inter-region interference, hence allows simultaneous detection of two different analytes or more accurate detection of a single analyte. The sensor also provides a self-referencing feature for a broad range of refractive index, from 1.3 to 1.5. Using the FDTD method, the sensitivities of 801.7 nm/RIU and 1386.8 nm/RIU have been recorded for the two modes respectively. The versatility of the structure makes the sensor a prominent candidate for biochemical and other sensing applications.
Cite
@article{arxiv.2105.09841,
title = {T Grating on Nano-Cavity Array based Refractive Index Sensor},
author = {Yasir Fatha Abed and Md Asif Hossain Bhuiyan and Sajid Muhaimin Choudhury},
journal= {arXiv preprint arXiv:2105.09841},
year = {2021}
}
Comments
8 pages, 7 figures