Detection of hydrogen by means of a thin film interferometer Fabry-Perot applying a-WO3 layers

2004 ◽  
Author(s):  
Erwin Maciak ◽  
Zbigniew Opilski ◽  
Marian W. Urbanczyk
Keyword(s):  
Thin Film ◽  
Fabry Perot

scholarly journals Analysis of Embedded Optical Interferometry in Transparent Elastic Grating for Optical Detection of Ultrasonic Waves

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2787
Author(s):  
Chayanisa Sukkasem ◽  
Suvicha Sasivimolkul ◽  
Phitsini Suvarnaphaet ◽  
Suejit Pechprasarn
Keyword(s):  
Thin Film ◽  
Grating Period ◽  
Ultrasonic Waves ◽  
Optical Interferometer ◽  
Ultrasonic Detection ◽  
Grating Pattern ◽  
Flexible Material ◽  
Resonant Modes ◽  
Elastic Film ◽  
Fabry Perot

In this paper, we propose a theoretical framework to explain how the transparent elastic grating structure can be employed to enhance the mechanical and optical properties for ultrasonic detection. Incident ultrasonic waves can compress the flexible material, where the change in thickness of the elastic film can be measured through an optical interferometer. Herein, the polydimethylsiloxane (PDMS) was employed in the design of a thin film grating pattern. The PDMS grating with the grating period shorter than the ultrasound wavelength allowed the ultrasound to be coupled into surface acoustic wave (SAW) mode. The grating gaps provided spaces for the PDMS grating to be compressed when the ultrasound illuminated on it. This grating pattern can provide an embedded thin film based optical interferometer through Fabry–Perot resonant modes. Several optical thin film-based technologies for ultrasonic detection were compared. The proposed elastic grating gave rise to higher sensitivity to ultrasonic detection than a surface plasmon resonance-based sensor, a uniform PDMS thin film, a PDMS sensor with shearing interference, and a conventional Fabry–Perot-based sensor. The PDMS grating achieved the enhancement of sensitivity up to 1.3 × 10−5 Pa−1 and figure of merit of 1.4 × 10−5 Pa−1 which were higher than those of conventional Fabry–Perot structure by 7 times and 4 times, respectively.

scholarly journals TiO_2 nanoparticle thin film-coated optical fiber Fabry-Perot sensor

2013 ◽  
Vol 21 (3) ◽  
pp. 3083 ◽  
Author(s):  
Mingshun Jiang ◽  
Qiu-Shun Li ◽  
Jun-Nan Wang ◽  
Zhongwei Jin ◽  
Qingmei Sui ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Fiber ◽  
Fabry Perot

Neutron tunneling and neutron lifetime in a NiVNi Fabry-Perot thin film resonator

1996 ◽  
Vol 223 (3) ◽  
pp. 145-148 ◽  
Author(s):  
M. Mâaza ◽  
B. Pardo ◽  
J.P. Chauvineau ◽  
A. Raynal ◽  
A. Menelle ◽  
...  
Keyword(s):  
Thin Film ◽  
Neutron Lifetime ◽  
Fabry Perot

Optical interleaver based on multicavity Fabry-Perot thin film filter

2002 ◽  
Author(s):  
Haixing Chen ◽  
Peifu Gu ◽  
Yueguang Zhang ◽  
Haifeng Li ◽  
Liu Xu
Keyword(s):  
Thin Film ◽  
Fabry Perot ◽  
Thin Film Filter

Observation of quasibound states of neutron in Fabry-Perot magnetic thin-film resonator using Larmor precession

1997 ◽  
Vol 241-243 ◽  
pp. 1083-1085 ◽  
Author(s):  
Masahiro Hino ◽  
Norio Achiwa ◽  
Seiji Tasaki ◽  
Toru Ebisawa ◽  
Takeshi Kawai ◽  
...  
Keyword(s):  
Thin Film ◽  
Magnetic Thin Film ◽  
Larmor Precession ◽  
Fabry Perot
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