Results 141 to 150 of about 89,156 (196)

Fiber SPR refractive index sensor with the variable core refractive index

Applied Optics, 2020
In this paper, a refractive index sensor based on the control of the fiber core refractive index is proposed. By employing ultraviolet curable adhesive with the different refractive index and hollow capillary fiber, the special fiber with a variable core refractive index is fabricated.
Chunlan Liu, Xin Zhang, Yachen Gao, Yong Wei, Ping Wu, Yudong Su, Peng Wu   +6 more
openaire   +2 more sources

A Terahertz Metasurface Based Refractive Index Sensor

2022 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2022
The proposed dual-layer highly coupled patch metasurface terahertz sensor achieves a maximum sensitivity of 0.65 THz/RIU, figure-of-merit of 1.828 RIU-1 in the sample refractive-index from 1.6-1.7, with quality factor of 6.3 for the bio-chemical applications.
M. S. Aruna Gandhi, N. Nagarajan, Rahul Singhal, Qian Li   +3 more
openaire   +1 more source

Ultrasensitive optofluidic resonator refractive index sensor

Optics Letters, 2018
We report an optofluidic resonator refractive index sensor based on an integrated structure constructed by a free-space coupling architecture. It uses a symmetrical metal-cladding hollow-core waveguide and a prism to generate surface plasmon polarization.
Zhiyuan, Xiao, Hailang, Dai, Xianfeng, Chen   +2 more
openaire   +2 more sources

Microstructured optical fiber refractive index sensor

Optics Letters, 2010
We describe a dual-core microstructured optical fiber designed for refractive index sensing of fluids. We show that by using the exponential dependence of intercore coupling on analyte refractive index, both large range and high sensitivity can be achieved in the one device.
Graham E, Town, Wu, Yuan, Ravi, McCosker, Ole, Bang   +3 more
openaire   +2 more sources

Microchannel-based plasmonic refractive index sensor for low refractive index detection

Applied Optics, 2019
A microchannel incorporated photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) sensor for detection of low refractive index (RI) at near-infrared wavelength is presented in this paper. To attain a simple and practically feasible mechanism, plasmonic material gold (Au) and sensing medium are placed outside the fiber. A thin layer of TiO2
Emranul Haque, Md. Anwar Hossain, Yoshinori Namihira, Feroz Ahmed   +3 more
openaire   +2 more sources

Novel optical refraction index sensor

SPIE Proceedings, 2011
This works describes a novel optical refraction index sensor which is based on the analysis of double reflection lecture detection. This process initially identifies the thickness of a semitransparent solid o liquid material by the retro-reflection of a laser diode at 633nm as a function of distance along the device under test with a Z-axis scanner ...
Helena S. de los Reyes-Cruz, Edgar S. Arroyo-Rivera, Arturo Castillo-Guzman, Mario S. Lopez-Cueva, Romeo Selvas   +4 more
openaire   +1 more source

Multimode interference tapered fiber refractive index sensors

Applied Optics, 2012
Real-time monitoring of the fabrication process of tapering down a multimode-interference-based fiber structure is presented. The device is composed of a pure silica multimode fiber (MMF) with an initial 125 μm diameter spliced between two single-mode fibers. The process allows a thin MMF with adjustable parameters to obtain a high signal transmittance,
Claudecir R, Biazoli, Susana, Silva, Marcos A R, Franco, Orlando, Frazão, Cristiano M B, Cordeiro   +4 more
openaire   +2 more sources

Ultrasensitive photonic crystal fiber refractive index sensor

Optics Letters, 2009
We introduce a microfluidic refractive index sensor based on a directional coupler architecture using solid-core photonic crystal fibers. The sensor achieves very high sensitivity by coupling the core mode to a mode in the adjacent fluid-filled waveguide that is beyond modal cutoff, and with strong field overlap.
Darran K C, Wu, Boris T, Kuhlmey, Benjamin J, Eggleton   +2 more
openaire   +2 more sources

Infrared metamaterial refractive-index-based sensor

Journal of the Optical Society of America B, 2020
We have introduced an infrared refractive-index-based sensor operating at the infrared frequency region. In designing the sensor, we have used a metamaterial structure with unit cells composed of two metallic layers, the first involving two metallic bars and slabs, and the second containing a uniform metallic sheet.
M. Askari, M. V. Hosseini
openaire   +1 more source