"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Highly sensitive biochemical sensor based on photonic crystal ring resonator

SUBHASHISH TIWARI1, ASHUTOSH K. DIKSHIT2, SATYABRATA JIT2, PRAVEEN C. PANDEY1,*

Affiliation

  1. Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India
  2. Department of Electronics Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India

Abstract

In this paper a bio-chemical sensor is proposed based on photonic crystal ring resonator. The sensing characteristics of two types of ring resonator structures based on square and circular ring are studied and compared. The refractive index of coupling rods, inner ring rods and coupling as well as inner ring rods combined together are varied according to the sample which is to be sensed. Normalized transmission peaks at resonance condition are plotted against wavelength using finite difference time-domain (FDTD) technique. Plane wave expansion (PWE) method has been used to calculate the photonic bandgap of the proposed structures. It is found that both types of ring resonators have shown high sensitivity when the refractive index of sample is varied from 3.1 to 3.7 in steps of 0.2..

Keywords

Photonic crystal, Ring resonator, Finite difference time domain, Plane wave expansion.

Citation

SUBHASHISH TIWARI, ASHUTOSH K. DIKSHIT, SATYABRATA JIT, PRAVEEN C. PANDEY, Highly sensitive biochemical sensor based on photonic crystal ring resonator, Optoelectronics and Advanced Materials - Rapid Communications, 10, 7-8, July-August 2016, pp.509-513 (2016).

Submitted at: May 27, 2015

Accepted at: Aug. 3, 2016