Investigation on spectral response of micro-cavity structure by symmetrical tapered fiber tips

2016 ◽  
Vol 368 ◽  
pp. 63-67 ◽  
Author(s):  
Yan Liu ◽  
Yang Li ◽  
Xiaojun Yan ◽  
Weidong Li
Keyword(s):  
Spectral Response ◽  
Tapered Fiber ◽  
Cavity Structure ◽  
Micro Cavity

Strain effect on spectral response of biconic tapered fiber interferometer

2012 ◽  
Author(s):  
H. S. Lin ◽  
Y. N. Phua ◽  
M. R. Mokhtar ◽  
H. A. Abdul-Rashid ◽  
M. Othman ◽  
...  
Keyword(s):  
Spectral Response ◽  
Strain Effect ◽  
Tapered Fiber

Ultra sensitive Bio-Chemical sensors Based on Optical Resonance

2005 ◽  
Vol 890 ◽  
Author(s):  
Shalini Prasad
Keyword(s):  
Chemical Sensors ◽  
Aqueous Media ◽  
Ring Structure ◽  
Resonant Wavelength ◽  
Wavelength Shift ◽  
Optical Resonance ◽  
High Q ◽  
Cavity Structure ◽  
In Situ Detection ◽  
Micro Cavity

ABSTRACTWith the focus on bio terrorism and environmental sensing, there is need for development of smart integrated bio-chemical sensors. We investigate Whispering Gallery Mode (WGM) based High Q micro cavity as a biosensor. We integrate the lab-on-a-chip approach with High Q technology to develop highly selective and smart sensors for in-situ detection of aqueous media based agents. We have investigated the ring based micro-cavity structure as a sensor. We identify the detection of agent through the changes observed in the wavelength shift and Q factor as a result of enzyme-substrate interactions. We report an experimental demonstration of a compact micro-cavity based biochemical sensor based on the micro ring structure. The micro-cavity, fabricated on a silica-on-silicon substrate, is designed to have a resonant wavelength (l) near 1.34 μm. The transmission spectrum of the sensor is measured with different ambient refractive indices ranging from n =1.0 to 1.5. Chemical detection was achieved by measuring the shift in resonant wavelength, and variation to the quality factor

High-precision flat-plate reference infrared radiator using perfect blackbody composite with micro-cavity structure

2021 ◽  
Author(s):  
Yuhei Shimizu ◽  
Masatoshi Imbe ◽  
kenji godo ◽  
Naohiko Sasajima ◽  
Hiroshi Koshikawa ◽  
...  
Keyword(s):  
Flat Plate ◽  
High Precision ◽  
Infrared Radiator ◽  
Cavity Structure ◽  
Micro Cavity

scholarly journals A Temperature Independent Inclinometer Based on a Tapered Fiber Bragg Grating in a Fiber Ring Laser

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 2892
Author(s):  
Weihao Lin ◽  
Shengjie Zhou ◽  
Liyang Shao ◽  
Mang I. Vai ◽  
Perry-Ping Shum ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Tilt Angle ◽  
Ring Laser ◽  
Variable Temperature ◽  
Spectral Response ◽  
Bragg Grating ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Tapered Fiber ◽  
Compact Size

We demonstrate a new concept for an all-fiber inclinometer based on a tapered fiber Bragg grating (tFBG) in a fiber ring laser (FRL) with the capability of measuring the tilt angle and temperature simultaneously. The sensor performance is analyzed theoretically and investigated experimentally. The dependence of tilt angle on the spectral response in variable temperature conditions was measured. Two inclinometers with different lengths have been fabricated and characterized in FRL. The sensitivity is 0.583 dB/° and 0.849 dB/°, respectively, in the range of 0° to 90°. Thanks to the FRL system, narrow 3-dB bandwidth (<0.1 nm) and high optical signal-to-noise ratio (~60 dB) are achieved. The tFBG in the FRL system can be used for working as a temperature insensitive inclinometer. The results suggested that the proposed inclinometer has the advantages of compact size and convenient manufacture, enhancing its potential for application prospect.

Research on micro-cavity structure processing technology based on porous silicon

2020 ◽  
Vol 34 (29) ◽  
pp. 2050319
Author(s):  
Zhi-Yuan Liu ◽  
Ying-Qi Shang ◽  
Hai-Chao Yu ◽  
Hong Qi ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Process Parameters ◽  
Sacrificial Layer ◽  
Electrochemical Corrosion ◽  
Processing Technology ◽  
Test Results ◽  
Cavity Structure ◽  
Micro Actuators ◽  
Application Fields ◽  
Micro Cavity

Aiming at the problem of heterogeneity of sealed cavity in silicon microstructure processing technology, the technology of preparing micro-cavity by using porous silicon sacrificial layer is proposed. The effect of current density on the preparation of porous silicon and the effect of porous silicon with different porosity on the formation of micro-cavity in the preparation process of porous silicon were studied. Different process parameters were selected for experiments and the prepared micro-cavities were tested and analyzed. According to the test results, the suitable electrochemical corrosion process parameters were selected to prepare porous silicon, and the micro-cavity was realized by changing the process parameters, which greatly increased the application fields of micro-sensors and micro-actuators.

Modulation and optimization of terahertz absorption in micro-cavity quantum well structures by graphene grating

2021 ◽  
Author(s):  
Zhiguo Li ◽  
Qiang Zhao ◽  
P P Chen ◽  
Jiqing Wang
Keyword(s):  
Quantum Well ◽  
Noble Metals ◽  
Structural Parameters ◽  
Incident Light ◽  
Suitable Alternative ◽  
Quantum Well Structures ◽  
Intersubband Absorption ◽  
Metal Insulator Metal ◽  
Cavity Structure ◽  
Micro Cavity

Abstract Metal-insulator-metal (MIM)-based plasmonic microcavity has attracted widespread interest due to its ability in manipulating and concentrating photons on the sub-wavelength scale. However, noble metals suffer from large intrinsic loss and lack active tunability. Here, a micro-cavity structure of quantum well sandwiched between periodic top contact of graphene grating and bottom contact graphene was proposed. Graphene plasmons provide a suitable alternative for metal plasmons and provide the advantage of being highly tunable by electrostatic gating. Effect of changes in both graphene physical and device structural parameters on optimized absorption performance was systematically analyzed through the calculation of reflectivity curves of incident light. Our results indicate that intersubband absorption of device can be improved by adjusting parameters of both graphene material and device structure. Furthermore, cavity resonant mode excited by surface plasmon polariton can be tuned to response frequency of quantum well under optimized parameters. Intersubband absorption is almost 1.5 times higher than that of a micro-cavity structure that uses metal grating.

IMI long-range surface plasmon Bragg micro-cavity

2016 ◽  
Vol 30 (30) ◽  
pp. 1650355 ◽  
Author(s):  
Kai Tong ◽  
Jun Wang ◽  
Chunliang Zhou ◽  
Meiting Wang
Keyword(s):  
Liquid Crystal ◽  
Quality Factor ◽  
Long Range ◽  
Surface Plasmon ◽  
Defect Mode ◽  
Defect Layer ◽  
Cavity Structure ◽  
Micro Cavity ◽  
Quality Factor Q ◽  
Photonic Energy

The defect layer is introduced to the insulator-metal-insulator (IMI) Bragg waveguide structure. The micro-cavity structure of long-range surface plasma is proposed based on the defect mode. The liquid crystal is the defect layer in the structure of Bragg. The energy band characteristics of the long-range surface plasmon Bragg micro-cavity structure are analyzed by using the finite difference time domain method. The influence of the period number and the length of the micro-cavity on the quality factor Q and the volume V of the Bragg grating are discussed. The results show that the photonic energy can be confined very well in the micro-cavity by the structure of the micro-cavity. By controlling the birefringence of liquid crystal, the resonance wavelength of the micro-cavity appears with redshift phenomenon. The tuning range is 42 nm. The tuning of the working window of the long-range surface plasmon filter is realized. The photonic energy is the strongest in the insulating layer and the metal interface. The increase of cycles number has certain limitation on the improvement of the quality factor Q of the cavity. The influence of the defect-cavity length on the resonant wavelength, the quality factor Q and the mode volume V is obvious. The performance of the micro-cavity can be improved by adjusting the number of the micro-cavity and the length of the defect-cavity, and the ratio of Q/V can reach 43,750 in the communication band. The nano micro-cavity provides a new design idea and basis for the fabrication of tunable long-range surface plasmon wave filter in this paper.

Dependence of output features of a micro-cavity laser on the cavity structure

2017 ◽  
Author(s):  
Kepeng Rong ◽  
Haizhi Song ◽  
You Wang ◽  
Hang Yu ◽  
Shunyan Wang ◽  
...  
Keyword(s):  
Cavity Structure ◽  
Cavity Laser ◽  
Micro Cavity

scholarly journals Improvement of Colour Gamut in Bottom-Emission Organic Light-Emitting Diodes Using Micro-Cavity Structure Embedded Cathodes

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 155 ◽  
Author(s):  
Hyunkoo Lee ◽  
Jonghee Lee ◽  
Jeong-Ik Lee ◽  
Nam Cho
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Optical Length ◽  
Television System ◽  
Light Emitting ◽  
Organic Light ◽  
Cavity Structure ◽  
Colour Gamut ◽  
Micro Cavity

We demonstrate an approach for improving the colour gamut of bottom-emission organic light-emitting diodes (OLEDs) through micro-cavity structure embedded cathodes. The devices with micro-cavity structure embedded cathodes showed an improved colour gamut of 91.5% (National Television System Committee (NTSC)), 95.8% (Adobe RGB), and 129.2% (sRGB), compared to those of the devices without micro-cavity structure embedded cathodes—59.2% (NTSC), 62.0% (Adobe RGB), 83.6% (sRGB). In addition, the performance of red, green, and blue devices are also investigated depending on the optical length of the micro-cavity structure.

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