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Journal of Infrared Millimeter and Terahertz Waves Volume 39 Issue 7

Subject Areas: Electrical and Electronic Engineering; ; ; ;
Publisher: Springer US - Springer Journals
ISSN: 1866-6892
SJR: 62

LitStream

Journal Article

Improvement of Mode Selectivity of High-Harmonic Gyrotrons by Using Operating Cavities with Short Output Reflectors

Oparina, Yuliya; Savilov, Andrey

2018 Journal of Infrared, Millimeter, and Terahertz Waves

doi:10.1007/s10762-018-0499-x

An important problem in realization of gyrotrons operating at high cyclotron harmonics is discrimination of parasitic oscillations excited at lower harmonics. In this paper, we propose to use an operating cavity with a short output irregularity providing a partial reflection of the operating...
LitStream

Journal Article

Feasibility and Characterization of Common and Exotic Filaments for Use in 3D Printed Terahertz Devices

Squires, A.; Lewis, R.

2018 Journal of Infrared, Millimeter, and Terahertz Waves

doi:10.1007/s10762-018-0498-y

Recent years have seen an influx of applications utilizing 3D printed devices in the terahertz regime. The simplest, and perhaps most versatile, modality allowing this is Fused Deposition Modelling. In this work, a holistic analysis of the terahertz optical, mechanical and printing properties of...
LitStream

Journal Article

Tuning of Terahertz Resonances of Pyridyl Benzamide Derivatives by Electronegative Atom Substitution

Dash, Jyotirmayee; Ray, Shaumik; Devi, Nirmala; Basutkar, Nitin; Gonnade, Rajesh; Ambade, Ashootosh; Pesala, Bala

2018 Journal of Infrared Millimeter and Terahertz Waves

doi:10.1007/s10762-018-0500-8

N-(pyridin-2-yl) benzamide (Ph2AP)-based organic molecules with prominent terahertz (THz) signatures (less than 5 THz) have been synthesized. The THz resonances are tuned by substituting the most electronegative atom, fluorine, at ortho (2F-Ph2AP), meta (3F-Ph2AP), and para (4F-Ph2AP) positions...
LitStream

Journal Article

Comparative Study of Hydration Kinetics of Cement and Tricalcium Silicate Using Terahertz Spectroscopy and Density Functional Theory Simulations

Ray, Shaumik; Dash, Jyotirmayee; Devi, Nirmala; Sasmal, Saptarshi; Pesala, Bala

2018 Journal of Infrared, Millimeter, and Terahertz Waves

doi:10.1007/s10762-018-0501-7

Cement hydration is a process involving simultaneous reactions of cement constituents, primarily tricalcium silicate (C3S) and dicalcium silicate (C2S), with the formation of key hydration products, calcium silicate hydrate (C–S–H) and calcium hydroxide (Ca(OH)2). Compared to the conventionally...
LitStream

Journal Article

THz Induced Nonlinear Effects in Materials at Intensities above 26 GW/cm2

Woldegeorgis, A.; Kurihara, T.; Beleites, B.; Bossert, J.; Grosse, R.; Paulus, G.; Ronneberger, F.; Gopal, A.

2018 Journal of Infrared, Millimeter, and Terahertz Waves

doi:10.1007/s10762-018-0493-3

Nonlinear refractive index and absorption coefficient are measured for common semiconductor material such as silicon and organic molecule such as lactose in the terahertz (THz) spectral regime extending from 0.1 to 3 THz. Terahertz pulses with field strengths in excess of 4.4 MV/cm have been...
LitStream

Journal Article

A THz Spectroscopy System Based on Coherent Radiation from Ultrashort Electron Bunches

Saisut, J.; Rimjaem, S.; Thongbai, C.

2018 Journal of Infrared, Millimeter, and Terahertz Waves

doi:10.1007/s10762-018-0491-5

A spectroscopy system will be discussed for coherent THz transition radiation emitted from short electron bunches, which are generated from a system consisting of an RF gun with a thermionic cathode, an alpha-magnet as a magnetic bunch compressor, and a linear accelerator for post-acceleration....

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