Highly sensitive optical coherent detection system using surface micromachining technology

1999 ◽  
Author(s):  
C. Pu ◽  
Z. Zhu ◽  
Y.-H. Lo
Keyword(s):  
Detection System ◽  
Coherent Detection ◽  
Surface Micromachining ◽  
Highly Sensitive

scholarly journals Terahertz quantum sensing

2020 ◽  
Vol 6 (11) ◽  
pp. eaaz8065 ◽  
Author(s):  
Mirco Kutas ◽  
Björn Haase ◽  
Patricia Bickert ◽  
Felix Riexinger ◽  
Daniel Molter ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Region Of Interest ◽  
Coherent Detection ◽  
Semiconductor Detectors ◽  
Terahertz Frequency ◽  
Sensing Applications ◽  
Highly Sensitive ◽  
Quantum Sensing ◽  
Thickness Measurements ◽  
Detection Schemes

Quantum sensing is highly attractive for accessing spectral regions in which the detection of photons is technically challenging: Sample information is gained in the spectral region of interest and transferred via biphoton correlations into another spectral range, for which highly sensitive detectors are available. This is especially beneficial for terahertz radiation, where no semiconductor detectors are available and coherent detection schemes or cryogenically cooled bolometers have to be used. Here, we report on the first demonstration of quantum sensing in the terahertz frequency range in which the terahertz photons interact with a sample in free space and information about the sample thickness is obtained by the detection of visible photons. As a first demonstration, we show layer thickness measurements with terahertz photons based on biphoton interference. As nondestructive layer thickness measurements are of high industrial relevance, our experiments might be seen as a first step toward industrial quantum sensing applications.

Highly Sensitive, Selective, and Rapid Detection of miRNA-21 using an RCA/G-Quadruplex/QnDESA Probing System

2021 ◽  
Author(s):  
Young Jun Seo ◽  
Tasnima Alam Asa ◽  
Ravi Kumara Guralamatta Siddappa
Keyword(s):  
Rapid Detection ◽  
Detection System ◽  
Single Step ◽  
Highly Sensitive ◽  
G Quadruplex

In this study we developed a very simple and rapid miRNA 21 detection system using a novel quinolinium diethylamino salicylaldehyde (QnDESA) probe for sensing the 22AG hybrid G-quadruplex with single-step...

Design of highly sensitive space point target detection system

2018 ◽  
Vol 11 (1) ◽  
pp. 115-122 ◽  
Author(s):  
刘 明 LIU Ming ◽  
邓 军 DENG Jun ◽  
冯献飞 FENG Xian-fei ◽  
钱峰松 QIAN Feng-song
Keyword(s):  
Target Detection ◽  
Detection System ◽  
Point Target ◽  
Highly Sensitive ◽  
Space Point ◽  
Point Target Detection

Effect of Time-Frequency Disturbance on Performance of Dual-Frequency Laser Coherent Detection System

2016 ◽  
Vol 53 (6) ◽  
pp. 061403 ◽  
Author(s):  
张建华 Zhang Jianhua ◽  
杨德钊 Yang Dezhao ◽  
高洁 Gao Jie ◽  
刘锡民 Liu Ximin
Keyword(s):  
Detection System ◽  
Coherent Detection ◽  
Dual Frequency ◽  
Time Frequency ◽  
Frequency Laser

Mixing Efficiency in Coherent Detection System

2017 ◽  
Vol 54 (10) ◽  
pp. 100605
Author(s):  
谭振坤 Tan Zhenkun ◽  
柯熙政 Ke Xizheng
Keyword(s):  
Detection System ◽  
Coherent Detection ◽  
Mixing Efficiency

Multichannel image-rejection coherent detection system

1990 ◽  
Vol 8 (12) ◽  
pp. 1874-1881 ◽  
Author(s):  
G. Lachs ◽  
R.E. Henning ◽  
Y. Choi ◽  
S.M. Zaidi
Keyword(s):  
Detection System ◽  
Coherent Detection ◽  
Image Rejection

Investigation of aging characteristics in explosive using terahertz time-domain spectroscopy

2019 ◽  
Vol 33 (24) ◽  
pp. 1950272 ◽  
Author(s):  
Wei Shi ◽  
Chengang Dong ◽  
Lei Hou ◽  
Zhiyang Xing ◽  
Qian Sun ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Fourier Transform ◽  
Absorption Spectra ◽  
Time Domain ◽  
Detection System ◽  
Coherent Detection ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Terahertz Absorption ◽  
Spectroscopy System

The terahertz absorption spectrum of the five aging explosive samples (PETN, RDX, HMX, LLM-105 and TATB) was measured and calculated by Terahertz time-domain spectroscopy system (THz-TDS) and air-biased coherent detection system (ZAP-ABCD), respectively. In this paper, compared with the unaging explosive, each aging explosive sample’s terahertz time-domain spectra were obtained and the terahertz absorption spectra were calculated by using Fourier transform and Lambert’s law. The results show that there are several terahertz absorption peaks which were called “fingerprint spectra” for different aging explosive samples in the range of 0.3–6.0 THz spectrum. Meanwhile, the results also show that the locations of the characteristic absorption peaks are not the same. Moreover, the unaging and aging explosive samples have obviously different terahertz absorption spectra.

Sign in / Sign up

Export Citation Format

Share Document