Proposal of highly sensitive optofluidic sensors based on dispersive photonic crystal waveguides
نویسندگان
چکیده
Optofluidic sensors based on highly dispersive two-dimensional photonic crystal waveguides are theoretically studied. Results show that these structures are strongly sensitive to the refractive index of the infiltrated liquid(nl), which is used to tune dispersion of the photonic crystal waveguide. Waveguide mode-gap edge shifts about 1.2 nm for δnl=0.002. The shifts can be explained well by band structure theory combined with first-order perturbation theory. These devices are potentially interesting for chemical sensing applications. PACS numbers: 07.07.Df, 42.79.Gn, 42.70.Qs
منابع مشابه
N ov 2 00 6 Highly dispersive photonic band - gap - edge optofluidic biosensors
Highly dispersive photonic band-gap-edge optofluidic biosensors are studied theoretically. We demonstrate that these structures are strongly sensitive to the refractive index of the liquid, which is used to tune dispersion of the photonic crystal. The upper frequency band-gap edge shifts about 1.8 nm for δn = 0.002, which is quite sensitive. Results from transmission spectra agree well with tho...
متن کاملDesign and simulation of a highly sensitive photonic crystal temperature sensor based on a cavity filled with the distilled water
In this paper design and two dimensional (2D) simulation of a photonic crystal highly sensitive temperature sensor is presented. The 2D simulations are based on finite-difference time-domain (FDTD) method and are done using Rsoft software. The device is constructed using a cavity filled with the distilled water located in the center of the photonic crystal waveguide. The operation of the propos...
متن کاملDesign and Simulation of a New Highly Sensitive Gas Sensor Based on Negative Refraction Photonic Crystal
In this paper, design and simulation of a new highly sensitive gas sensor based on a hybrid photonic crystal (PC) structure, containing negative and positive refractive index sections, is presented. It has been shown that using a PC with negative refraction in the first section, the transmitted power is concentrated on the entrance of the sensing channel, and the transmission of the proposed se...
متن کاملAll-fiber Optofluidic Biosensor
Optical fiber provides a unique and versatile platform for developing point-of-care optical sensing systems. Here we first propose a Fabry-Pérot (FP) based flow-through optofluidic biosensor, and then construct an all-fiber system which fully utilizes optical fibers to achieve rapid, sensitive, label-free biomolecular detection. This sensor consists of two single mode fibers (SMFs) with reflect...
متن کاملUltra-Fast All-Optical Symmetry 4×2 Encoder Based on Interface Effect in 2D Photonic Crystal
This paper deals with the design and simulation of all-optical 4×2 encoderusing the wave interference effect in photonic crystals. By producing 4 opticalwaveguides as input and two waveguides as output, the given structure was designed.The size of the designed structure is 133.9 μm2. The given all-optical encoder has acontrast ratio of 13.2 dB, the response time of 0.45 ...
متن کامل