Broadband terahertz time-domain spectroscopy and fast FMCW imaging: Principle and applications

doi:10.1088/1674-1056/ab9296

Abstract We report a broadband terahertz time-domain spectroscopy (THz-TDS) which enables twenty vibrational modes of adenosine nucleoside to be resolved in a wide frequency range of 1-20 THz. The observed spectroscopic features of adenosine are in good agreement with the published spectra obtained using Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. This much extended bandwidth leads to enhanced material characterization capability as it provides spectroscopic information on both intra- and inter-molecular vibrations. In addition, we also report a low-cost frequency modulation continuous wave (FMCW) imaging system which has a fast measurement speed of 40000 waveforms per second. Cross-sectional imaging capability through cardboard has also been demonstrated using its excellent penetration capability at a frequency range of 76-81 GHz. We anticipate that the integration of these two complementary imaging technologies would be highly desirable for many real-world applications because it provides both spectroscopic discrimination and penetration capabilities in a single instrument.

Keywords: terahertz time-domain spectroscopy (THz-TDS) FMCW radar adenosine nucleoside

Received: 01 April 2020
Revised: 04 May 2020
Accepted manuscript online:

PACS:	87.14.gf	(Nucleotides)
	82.80.Gk	(Analytical methods involving vibrational spectroscopy)
	78.47.J-	(Ultrafast spectroscopy (<1 psec))
	84.40.-x	(Radiowave and microwave (including millimeter wave) technology)

Fund: Project supported by the Royal Society and Natural Science Foundation of China (NSFC) International Exchanges Cost Share (IEC\backslashNSFC\backslash181415).

Corresponding Authors: Yao-Chun Shen
E-mail: ycshen@liverpool.ac.uk

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Yao-Chun Shen(沈耀春), Xing-Yu Yang(杨星宇), Zi-Jian Zhang(张子健) Broadband terahertz time-domain spectroscopy and fast FMCW imaging: Principle and applications 2020 Chin. Phys. B 29 078705

[1]	Ferguson B and Zhang X C 2002 Nat. Mater. 1 26
[2]	Jepsen P U, Cooke D G and Koch M 2011 Laser Photon. Rev. 5 124
[3]	Zeitler J A and Shen Y C 2012 Industrial Applications of Terahertz Imaging In: Terahertz Spectroscopy and Imaging. Springer Series in Optical Sciences, Peiponen K E, Zeitler A and Kuwata-Gonokami M (Eds.) Vol. 171 (Berlin: Springer) p. 451
[4]	Karpowicz N, Zhong H, Xu J, Lin K I, Hwang J S and Zhang X C 2005 Semicond. Sci. Technol. 20 S293
[5]	Auston D, Cheung K and Smith P 1984 Appl. Phys. Lett. 45 284
[6]	Katzenellenbogen N and Grischkowsky D 1991 Appl. Phys. Lett. 58 222
[7]	Berry C W, Wang N, Hashemi M R, Unlu M and Jarrahi M 2013 Nat. Commun. 4 1622
[8]	Wu Q and Zhang X C 1997 Appl. Phys. Lett. 71 1285
[9]	Kaindl R, Eickemeyer F, Woerner M and Elsaesser T 1999 Appl. Phys. Lett. 75 1060
[10]	Xie X, Dai J and Zhang X C 2006 Phys. Rev. Lett. 96 075005
[11]	Yiwen E, Jin Q, Tcypkin A and Zhang X 2018 Appl. Phys. Lett. 113 181103
[12]	Shen Y C, Upadhya P, Beere H, Linfield E, Davies A, Gregory I, Baker C, Tribe W and Evans M 2004 Appl. Phys. Lett. 85 164
[13]	Wu Q and Zhang X C 1995 Appl. Phys. Lett. 67 3523
[14]	Hartwick T, Hodges D, Barker D and Foote F 1976 Appl. Opt. 15 1919
[15]	Grossman E, Dietlein C, Ala-Laurinaho J, Leivo M, Gronberg L, Gronholm M, Lappalainen P, Rautiainen A, Tamminen A and Luukanen A 2010 Appl. Opt. 49 E106
[16]	Appleby R 2004 Philos. Trans. R. Soc. A 362 379
[17]	Bhutani A, Marahrens S, Gehringer M, Göttel B, Pauli M and Zwick T 2019 Sensors 19 3938
[18]	Bilik I, Longman O, Villeval S and Tabrikian J 2019 IEEE Signal Process. Mag. 36 20
[19]	Shen Y C, Upadhya P, Linfield E, Beere H and Davies A 2003 Appl. Phys. Lett. 83 3117
[20]	Singh A, Pashkin A, Winnerl S, Welsch M, Beckh C, Sulzer P, Leitenstorfer A, Helm M and Schneider H 2020 Light Sci. Appl. 9 1
[21]	Hale P, Madeo J, Chin C, Dhillon S, Mangeney J, Tignon J and Dani K 2014 Opt. Express 22 26358
[22]	Fischer B, Walther M and Jepsen P U 2002 Phys. Med. Biol. 47 3807
[23]	Bailey L E, Navarro R and Hernanz A 1997 Biospectroscopy 3 47
[24]	Plazanet M, Fukushima N and Johnson M 2002 Chem. Phys. 280 53
[25]	Mathlouthi M, Seuvre A M and Koenig J L 1984 Carbohydr. Res. 131 1
[26]	Xiao Z Y and Wang Z H 2006 J. Opt. Soc. Am. B 23 1757
[27]	Shen Y C and Taday P F 2008 IEEE J. Sel. Top. Quantum Electron. 14 407

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