Performance investigation of triple unsymmetrical micro ring resonator as optical filter as well as biosensor

Abstract

Representation of triple unsymmetrical micro ring resonators (TUMRR) with single input and single output waveguide has been executed in this paper. Statistical demonstration of the presented arrangement is realized in the z-domain by a delay line signal processing method. The transfer function of the triple unsymmetrical micro ring resonator is calculated by Mason’s Gain rule. The offered arrangement is performed on SOI (Silicon in Insulator) platform to achieve the filtering and biochemical sensing intentions. To acquire field response of the arrangement, Finite difference time domain (FDTD) technique is used. Characteristics of optical filters are studied from the frequency response plot and the achieved free spectral range is 243.5 GHz. The shift in wavelength for biosensing application is accomplished through the OptiFDTD software. The sensitivity of the proposed TUMRR based biosensor is around 200–280 nm/RIU for different blood cells where as the Q-factor attained is 1938.

Enhancing Vernier Effect through Integrated Add-Drop Microresonator for High Sensitivity All-Optical Sensing

“…In recent years, MRR has attracted broad research interest in sensing applications due to their compact footprint [1], [2], low power consumption [1], low cost [2], convenience of integration [1], easy fabrication [2], high sensitivity [2] and the ability to work with complimentary metal-oxide-semiconductor (CMOS) technology [3]. Today, the MRR are practical devices in sensing application fields such as biochemical [4]- [7], gas [8]- [10], temperature [11]- [13] and pressure sensors [14]- [17].…”

Sensing Characteristics of a Three-Ring Grating Slit Micro Ring Resonator

“…Therefore, the device structure based on SOI platform has become a research hotspot in the field of silicon-based photonic integration and optoelectronic integration. Due to its high quality factor and low loss, the micro ring resonator (MRR) based on SOI is used to produce various optical devices, such as filters [3], optical division multiplexer [4], optical switch [5], sensor [6], etc., which has a wide range of applications in environmental monitoring, homeland security, biochemistry and medical treatment [7,8].Because the transmission lines of traditional micro ring resonators are symmetrical Lorentz type [9], the quality factor and sensitivity are low. By designing a new structure, the transmission line can be changed from Lorentz type to Fano type, or the EIT-Like effect can be generated to improve the quality factor, extinction ratio (ER) and sensitivity of the micro ring resonator [10].…”