Abstract

In this paper, we demonstrate and theoretically investigate a compact two-dimensional (2D) photonic crystal biosensor implemented by a waveguide and cavity. Biomaterials such as DNA molecules and proteins trapped inside a hole cause resonant wavelength shifting at the output terminal. The quality factor and sensitivity were obtained at about 4000 and $1.63\mathrm{nm}/\mathrm{fg}$, respectively. Also, we investigated this structure as a bulk refractive index sensor with a sensitivity of about $165.45\mathrm{nm}/\mathrm{RIU}$ (refractive index units). Then, we modified the structure as a multichannel biosensor. This biosensor has the capability of highly parallel operation because of special architecture that was obtained by lattice shifting of a single hole around the cavity. Each channel had a different resonant cavity wavelength and the filling of analyte in selected holes caused resonant wavelength shifting, independently. Plane wave expansion (PWE) and finite difference time domain (FDTD) methods were used to analyze and compute the sensor characteristics.

© 2013 Optical Society of America

Photonic crystal microring resonator for label-free biosensing

Stanley M. Lo, Shuren Hu, Girija Gaur, Yiorgos Kostoulas, Sharon M. Weiss, and Philippe M. Fauchet
Opt. Express 25(6) 7046-7054 (2017)

On the performance of label-free biosensors based on vertical one-dimensional photonic crystal resonant cavities

Salvatore Surdo and Giuseppe Barillaro
Opt. Express 23(7) 9192-9201 (2015)

High-sensitivity quasi-periodic photonic crystal biosensor based on multiple defective modes

Xiaoqing Wang, Lin Zhou, Tingting Zhao, Xing Liu, Shuai Feng, Xiao Chen, Honglian Guo, Chuanbo Li, and Yiquan Wang
Appl. Opt. 58(11) 2860-2866 (2019)

Optical Fano resonance sensing of bilayer asymmetric photonic crystal slabs as biosensors

Daohan Ge, Jianpei Shi, Ahmed Rezk, Yuan Zhang, Jinxiu Wei, Liqiang Zhang, and Shining Zhu
Appl. Opt. 58(12) 3187-3192 (2019)

Design of an optofluidic biosensor using the slow-light effect in photonic crystal structures

F. Hosseinibalam, S. Hassanzadeh, A. Ebnali-Heidari, and C. Karnutsch
Appl. Opt. 51(5) 568-576 (2012)