Design and performance of reflective ultra-broadband terahertz time-domain spectroscopy with air-biased-coherent-detection

2010 ◽  
Author(s):  
I-Chen Ho ◽  
Xiaoyu Guo ◽  
X.-C. Zhang
Keyword(s):  
Time Domain ◽  
Coherent Detection ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
And Performance ◽  
Broadband Terahertz

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.

Characteristic fingerprint spectrum of neurotransmitter norepinephrine with broadband terahertz time-domain spectroscopy

The Analyst ◽  
2019 ◽  
Vol 144 (8) ◽  
pp. 2504-2510 ◽  
Author(s):  
Zhongjie Zhu ◽  
Chao Cheng ◽  
Chao Chang ◽  
Guanhua Ren ◽  
Jianbing Zhang ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Time Domain ◽  
Vibrational Modes ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Thz Absorption ◽  
Broadband Terahertz

A broadband THz absorption spectrum of NE corresponds to specific vibrational modes.

Broadband terahertz time-domain spectroscopy of drugs-of-abuse and the use of principal component analysis

The Analyst ◽  
2009 ◽  
Vol 134 (8) ◽  
pp. 1658 ◽  
Author(s):  
Andrew D. Burnett ◽  
Wenhui Fan ◽  
Prashanth C. Upadhya ◽  
John E. Cunningham ◽  
Michael D. Hargreaves ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Time Domain ◽  
Drugs Of Abuse ◽  
Principal Component ◽  
Component Analysis ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Broadband Terahertz

TERAHERTZ TIME-DOMAIN SPECTROSCOPY BASED ON NONLINEAR OPTICS

2002 ◽  
Vol 11 (01) ◽  
pp. 31-48 ◽  
Author(s):  
JIE SHAN ◽  
AJAY NAHATA ◽  
TONY F. HEINZ
Keyword(s):  
Nonlinear Optics ◽  
Time Domain ◽  
Second Harmonic ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Coherent Detection ◽  
Optical Rectification ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Multichannel Detection

We present a brief review of the use of nonlinear optics for broadband terahertz (THz) time-domain spectroscopy with femtosecond laser pulses. The generation of THz pulses is accomplished by optical rectification and coherent detection by electro-optic sampling or field-induced second-harmonic generation. The approach permits exceptional time response, as well as the possibility for multichannel detection schemes.

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