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Ultra-High Repetition Rate Terahertz Time-Domain Spectroscopy for Micrometer Layer Thickness Measurement

Kevin Kolpatzeck, Xuan Liu, Lars Häring, Jan C. Balzer, Andreas Czylwik
2021 Sensors  
Their main difference compared to fiber-laser-driven systems is their ultra-high repetition rate of typically dozens of GHz.  ...  Terahertz time-domain spectroscopy systems driven by monolithic mode-locked laser diodes (MLLDs) exhibit bandwidths exceeding 1 THz and a peak dynamic range that can compete with other state-of-the-art  ...  Because of this fundamental property, we call this approach ultra-high repetition rate (UHRR) THz-TDS [18] .  ... 
doi:10.3390/s21165389 pmid:34450830 pmcid:PMC8400559 fatcat:gal37p7nkrh5vopcs7frmrwnc4

Solid-state-biased coherent detection of ultra-broadband terahertz pulses

Alessandro Tomasino, Anna Mazhorova, Matteo Clerici, Marco Peccianti, Sze-Phing Ho, Yoann Jestin, Alessia Pasquazi, Andrey Markov, Xin Jin, Riccardo Piccoli, Sebastien Delprat, Mohamed Chaker (+4 others)
2017 Optica  
Eventually, this may pave the way for the use of high-repetition-rate ultrafast lasers and commercially available electronics for the coherent detection of ultrashort THz pulses.  ...  thin layer of ultraviolet fused silica.  ...  Nowadays, research labs and companies own a wide portfolio of THz-time domain spectroscopy (THz-TDS) systems, performing field-resolved experiments with bandwidths up to 7 THz [5] [6] [7] .  ... 
doi:10.1364/optica.4.001358 fatcat:7q4trkdycvhcpjik74imo77nku

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Tao, Fitzgerald, Wallace
2020 Sensors  
In this article, we survey various non-contact, non-destructive testing methods by way of terahertz (THz) spectroscopy and imaging designed for use in various industrial sectors.  ...  Material characterization, thickness measurement, and defect/corrosion assessment are demonstrated through the examples presented.  ...  Thickness measurements have been demonstrated with both TDS and CW systems. In a TDS setup, reflections from the layer interfaces are identified as peaks in the time domain.  ... 
doi:10.3390/s20030712 pmid:32012901 pmcid:PMC7039230 fatcat:ecss3eoxerdu7efmak7ihh2fiy

Terahertz Nanoantennas for Enhanced Spectroscopy [chapter]

Riccardo Piccoli, Andrea Rovere, Andrea Toma, Roberto Morandotti, Luca Razzari
2017 Terahertz Spectroscopy - A Cutting Edge Technology  
Terahertz spectroscopy has great potential for sensing a wide range of elementary excitations.  ...  In this chapter, we show how terahertz nanoantennas can overcome the current limitations of terahertz spectroscopy such as low sensitivity and low spatial resolution.  ...  Then, a 5-nm-thick adhesion layer of titanium was prepared using electron beam evaporation, with a 0.3-Å/s deposition rate in a high vacuum chamber (base pressure 10 −7 mbar).  ... 
doi:10.5772/66349 fatcat:asekbnp3cndtdolei757jmvylu

Note: High sensitivity pulsed electron spin resonance spectroscopy with induction detection

Ygal Twig, Ekaterina Dikarov, Wayne D. Hutchison, Aharon Blank
2011 Review of Scientific Instruments  
Instrum. 83, 124701 (2012) GaP based terahertz time-domain spectrometer optimized for the 5-8 THz range Appl. Phys.  ...  Lett. 101, 181101 (2012) On the performance enhancement of adaptive signal averaging: A means for improving the sensitivity and rate of data acquisition in magnetic resonance and other analytical measurements  ...  Frequency: 13.736 GHz, repetition rate: 1000 Hz. Averaging time 8 s.  ... 
doi:10.1063/1.3611003 pmid:21806239 fatcat:ycmxwpfuk5c4tobwwpies4lhye

THz metamaterials and plasmonics using 2D materials & highly conductive transparent oxides [article]

Sara Arezoomandan
2018 arXiv   pre-print
Driven by a myriad of potential applications such as communications, medical imaging, security, spectroscopy, and so on, terahertz (THz) technology has emerged as a rapidly growing technological field  ...  Therefore, there is wide interest in the community in employing novel naturally-occurring materials, such as 2D materials, as well as in designing artificial metamaterial structures for THz applications  ...  ACKNOWLEDGMENTS The authors thank David Schurig and Ajay Nahata for useful discussions. The authors acknowledge the support from the NSF MRSEC program at the University of Utah under grant #  ... 
arXiv:1801.00851v2 fatcat:5crtw2njoberrcj4pso4oz4d6q

Broadband Terahertz Light–Matter Interaction Enhancement for Precise Spectroscopy of Thin Films and Micro-Samples

Romain Peretti, Flavie Braud, Emilien Peytavit, Emmanuel Dubois, Jean-François Lampin
2018 Photonics  
time-domain spectroscopy (TDS) [12, 13] experiments.  ...  Finally, we demonstrate the validity of our approach by time-domain spectroscopy of samples of a few µL. for spectroscopy, especially for biological systems, since the energy of the photon in the THz range  ...  The authors are grateful to Sergey Mitryukovskiy and Garrett Curley for careful proofreading.  ... 
doi:10.3390/photonics5020011 fatcat:dhtkak2mfzfndl5gj2nqojlogu

High Throughput Laser Process of Transparent Conducting Surfaces for Terahertz Bandpass Ultrathin Metamaterials

Qinghua Wang, Michaella Raglione, Baojia Li, Xin Jin, Fatima Toor, Mark Arnold, Hongtao Ding
2019 Scientific Reports  
In this paper, we present a novel Laser-based Metamaterial Fabrication (LMF) process for high-throughput fabrication of transparent conducting surfaces on dielectric substrates such as glass, quartz and  ...  Terahertz (THz) imaging has attracted much attention within the past decade as an emerging nondestructive evaluation technique.  ...  The authors would also like to acknowledge University of Iowa Microfabrication Facility (UIMF) for providing the sputtering and evaporation facilities for deposition of ultra-thin Al and Cu films.  ... 
doi:10.1038/s41598-019-38949-1 pmid:30816138 pmcid:PMC6395646 fatcat:aypguh2rzndbrfr56c7zu3ykum

Studies of Terahertz Sources and Their Applications [chapter]

Sukhmander Singh, Shravan Kumar Meena, Ashish Tyagi, Sanjeev Kumar, Man Raj Meena, Sujit Kumar Saini
2022 Intelligent Electronics and Circuits - Terahertz, IRS, and Beyond [Working Title]  
The contributed chapter discuss the applications of terahertz radiations and its generation mechanism through laser plasma interactions.  ...  The methods of generation of terahertz radiations from plasma wake field acceleration, higher harmonic generation and the laser beat wave plasma frequency are reviewed.  ...  Non damaging testing The penetration length of radiations are measured by THz time-domain spectroscopy. The safety and penetrable properties of THz waves are useful for nondestructive testing.  ... 
doi:10.5772/intechopen.101685 fatcat:lrwefmlbafhfredegfd5v24miu

Diffraction-limited ultrabroadband terahertz spectroscopy

M. Baillergeau, K. Maussang, T. Nirrengarten, J. Palomo, L. H. Li, E. H. Linfield, A. G. Davies, S. Dhillon, J. Tignon, J. Mangeney
2016 Scientific Reports  
The strong focusing of ultrabroadband THz radiation provided by our approach is essential for investigating single micrometer-scale objects such as graphene flakes or living cells, and besides for achieving  ...  Applying this concept to a large-area photoconductive emitter, we demonstrate diffraction-limited ultra-broadband spectroscopy system up to 14.5 THz with a dynamic range of 10 3 .  ...  Terahertz spectroscopy in the time-domain is widely used for fundamental investigations of condensed and biological matter as well as for a broad range of applications.  ... 
doi:10.1038/srep24811 pmid:27142959 pmcid:PMC4855139 fatcat:g3wqr7jhvbf5jjutypbhtz24ea

Terahertz Imaging Systems With Aperture Synthesis Techniques

V Krozer, Torsten Löffler, J Dall, A Kusk, F Eichhorn, R K Olsson, J D Buron, P U Jepsen, V Zhurbenko, T Jensen
2010 IEEE transactions on microwave theory and techniques  
Active multichannel measurement method is found to be promising for real-time applications among the various terahertz imaging techniques and is chosen as a basis for the imaging instruments presented  ...  The described instruments employ a multichannel high-sensitivity heterodyne architecture and aperture filling techniques, with close to real-time image acquisition time.  ...  The authors would like to thank OFS Fitel Denmark ApS for supplying us with the DCF fiber modules.  ... 
doi:10.1109/tmtt.2010.2050246 fatcat:wjjtshpp3respd7icskkdz72yy

Electrical scanning probe microscopy of electronic and photonic devices: connecting internal mechanisms with external measures

Dayan Ban, Boyu Wen, Rudra Sankar Dhar, Seyed Ghasem Razavipour, Chao Xu, Xueren Wang, Zbig Wasilewski, Sinjin Dixon-Warren
2016 Nanotechnology Reviews  
Electrical scanning probe microscopy (SPM) techniques have been developed and deployed to measure, with nanometric spatial resolution and high quantitative accuracy, the two-dimensional profiles of dopant  ...  capacitance microscopy of non-volatile memory devices, scanning voltage microscopy of terahertz quantum cascade lasers, and scanning voltage microscopy of interband cascade lasers.  ...  All parameters refer to pulsed operation at a repetition rate of 1 kHz and a pulse width of 250 ns for L-J-V measurements.  ... 
doi:10.1515/ntrev-2015-0035 fatcat:i4at47ryi5curlzixrjpm4pv7e

Terahertz-bandwidth characteristics of coplanar transmission lines on low permittivity substrates

Heng-Ju Cheng, J.F. Whitaker, T.M. Weller, L.P.B. Katehi
1994 IEEE transactions on microwave theory and techniques  
In addition, for the coplanar waveguide structures, waveforms corresponding to the even and odd modes have been individually resolved in the time domain for lines fabricated on the GaAs and membrane substrates  ...  Pulse-propagation characteristics for the coplanar lines on the low-permittivity substrates have been compared in both the time and frequency domains with the transmission behavior of lines on GaAs substrates  ...  Smith of the Massachusetts Institute of Technology, Lincoln Laboratory for providing lowtemperature grown GaAs layers.  ... 
doi:10.1109/22.339773 fatcat:eqyhskelrbef7nsj7p4yg4s3za

Optoelectronic characterization of transmission lines and waveguides by terahertz time-domain spectroscopy

D.R. Grischkowsky
2000 IEEE Journal of Selected Topics in Quantum Electronics  
Starting with the early optoelectronic generation and detection of single-mode, subpicosecond electrical pulses on coplanar transmission lines, their complete characterization by THz time-domain spectroscopy  ...  The importance of dielectric materials characterization is explained and illustrated by THz-TDS measurements of high substrates.  ...  ACKNOWLEDGMENT It has been the author's pleasure to have worked with the following outstanding scientists for various lengths of time, while we developed and demonstrated the usefulness of the optoelectronic  ... 
doi:10.1109/2944.902161 fatcat:ceuf45tudrcmlcdfcnevikb4lu

Breakthroughs in Photonics 2009

2010 IEEE Photonics Journal  
Mutig for his assistance with this manuscript and J. A. Lott, S. A. Blokhin, G. Fiol, N. N. Ledentsov, and A. M. Nadtochiy for contributing to the work at TU Berlin.  ...  Time-domain spectroscopy has become a standard tool for the generation and detection of singlecycle terahertz pulses, but in most cases, the pulse energy is quite low.  ...  The pulse repetition rate still sets a limit on the signal-to-noise ratio for attosecond pump-probe measurements, and therefore, other streaking techniques have resulted in time-resolved measurements with  ... 
doi:10.1109/jphot.2010.2048944 fatcat:4wnfxni2qzcwnfatprdbmqvqfy
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