Graphene oxide-coated Long Period Grating-based fibre optic sensor for relative humidity and external refractive index [PDF]
, 2017 IEEE Graphene oxide is a very attractive material for refractive index and humidity sensing due to its unique two-dimensional structure, which results in faster response times and improved sensitivity over alternative materials.
Dissanayake, K. P. W. +4 more
core +1 more source
Use of polyethylene glycol coatings for optical fibre humidity sensing [PDF]
, 2008 Humidity induced change in the refractive index and thickness of the polyethylene glycol (PEG) coatings are in situ investigated for a range from 10 to 95%, using an optical waveguide spectroscopic technique.
B. D. Gupta +31 more
core +2 more sources
Diffractive optics approach towards subwavelength pixels
, 2018 Pixel size in cameras and other refractive imaging devices is typically limited by the free-space diffraction. However, a vast majority of semiconductor-based detectors are based on materials with substantially high refractive index.
Fan, Bo +2 more
core +1 more source
Ultrasensitive twin-core photonic bandgap fiber refractive index sensor [PDF]
, 2009 We propose a microfluidic refractive index sensor based on new polymer twin-core photonic bandgap fiber (PBGF). The sensor can achieve ultrahigh detection limit, i.e.
Bang, Ole, Town, Graham, Yuan, Scott Wu
core +1 more source
Plasmon Interferometers for High-Throughput Sensing [PDF]
, 2012 Cataloged from PDF version of article.In this letter, we demonstrate a refractive index sensor based on a subwavelength plasmon interferometer. Illumination of an atilt subwavelength slit-grove pair on a metal surface with monochromatic light generates ...
Kocabas, C., Yavas, O.
core +1 more source
Refractive Index Sensing by Using Mechanically Induced Long-Period Grating
IEEE Photonics Journal, 2012 In this paper, a refractive index sensor using a mechanically induced long-period grating is proposed and experimentally demonstrated. The sensing element is based on a composite optical waveguide, which is made of a single-mode fiber, a Teflon-cannula ...
Xiaojun Zhou +3 more
doaj +1 more source
Sensitivity Enhancement of a Concave Shaped Optical Fiber Refractive Index Sensor Covered with Multiple Au Nanowires [PDF]
, 2019 In the present paper, a new kind of concave shaped refractive index sensor (CSRIS) exploiting localized surface plasmon resonance (LSPR) is proposed and numerically optimized.
Kumari, S. +3 more
core +1 more source
Beilstein Journal of Nanotechnology, 2016 In this paper we report the design and experimental realisation of a novel refractive index sensor based on coupling between three nanoscale stripe waveguides. The sensor is highly compact and designed to operate at a single wavelength.
Chamanei Perera +5 more
doaj +1 more source
Nanofluidic Refractive-Index Sensors Formed by Nanocavity Resonators in Metals without Plasmons
Sensors, 2011 Nanocavity resonators in metals acting as nanofluidic refractive-index sensors were analyzed theoretically. With the illumination of transverse electric polarized light, the proposed refractive index sensor structure acts as a pure electromagnetic ...
Shih-Pin Tsai +3 more
doaj +1 more source
Sensitivity enhancement in evanescent optical waveguidesensors [PDF]
, 2000 It is shown, that the sensitivity of the effective refractive index on the cladding index in evanescent optical waveguide sensors, can be larger than unity.
Hoekstra, H.J.W.M. +3 more
core +2 more sources