Results 41 to 50 of about 1,859,983 (208)

Investigation of terahertz radiation influence on rat glial cells.

Biomedical Optics Express, 2017
We studied an influence of continuous terahertz (THz) radiation (0.12 - 0.18 THz, average power density of 3.2 mW/cm2) on a rat glial cell line. A dose-dependent cytotoxic effect of THz radiation is demonstrated.
M. Borovkova, M. Serebriakova, V. Fedorov, E. Sedykh, V. Vaks, A. Lichutin, A. Salnikova, M. Khodzitsky   +7 more
semanticscholar   +1 more source

Generation of high-field narrowband terahertz radiation by counterpropagating plasma wakefields [PDF]

, 2016
It is found that nonlinear interaction of plasma wakefields driven by counterpropagating laser or particle beams can efficiently generate high-power electromagnetic radiation at the second harmonic of the plasma frequency.
I. Timofeev, V. Annenkov, E. Volchok
semanticscholar   +1 more source

The 2023 terahertz science and technology roadmap

, 2023
Terahertz (THz) radiation encompasses a wide spectral range within the electromagnetic spectrum that extends from microwaves to the far infrared (100 GHz–∼30 THz).
A. Leitenstorfer, A. S. Moskalenko, T. Kampfrath, J. Kono, E. Castro-Camus, Kun Peng, N. Qureshi, D. Turchinovich, Koichiro Tanaka, A. Markelz, M. Havenith, Cameron Hough, H. Joyce, Willie J Padilla, Binbin Zhou, Ki-Yong Kim, Xi-Cheng Zhang, P. Jepsen, S. Dhillon, M. Vitiello, E. Linfield, A. Davies, M. Hoffmann, R. Lewis, M. Tonouchi, P. Klarskov, T. Seifert, Y. Gerasimenko, D. Mihailovic, R. Huber, J. Boland, O. Mitrofanov, P. Dean, B. Ellison, P. Huggard, S. Rea, C. Walker, D. Leisawitz, Jianxun Gao, Chong Li, Qin Chen, G. Valušis, V. Wallace, E. Pickwell‐MacPherson, X. Shang, J. Hesler, N. Ridler, C. Renaud, I. Kallfass, T. Nagatsuma, J. Zeitler, D. Arnone, M. Johnston, J. Cunningham   +53 more
semanticscholar   +1 more source

Generation of terahertz radiation by AlGaAs nanowires [PDF]

JETP Letters, 2015
Terahertz emission by AlGaAs nanowires grown on a GaAs substrate under excitation by femtosecond optical pulses has been observed. It is demonstrated that THz emission occurs via excitation of photocurrent in the nanowires. The dynamics of photoinduced charge carriers is studied via the influence of an electron—hole plasma on terahertz radiation. It is
Andrew J. Gallant, G. E. Cirlin, M. A. Kaliteevski, M. A. Kaliteevski, V. N. Trukhin, I. A. Mustafin, Yu. B. Samsonenko, A. C. Buyskih, A. V. Trukhin, A. V. Trukhin, Dagou A. Zeze, A. D. Bouravlev, A. D. Bouravlev, A. D. Bouravlev   +13 more
openaire   +3 more sources

Tunable Circularly Polarized Terahertz Radiation from Magnetized Gas Plasma. [PDF]

Physical Review Letters, 2015
It is shown, by simulation and theory, that circularly or elliptically polarized terahertz radiation can be generated when a static magnetic (B) field is imposed on a gas target along the propagation direction of a two-color laser driver.
Weimin Wang, Paul Gibbon, Zheng-Ming Sheng, Yutong Li   +3 more
semanticscholar   +1 more source

Photoconductive antennas for terahertz radiation.

, 2018
Photoconductive materials are currently used to design antennas that radiate in the terahertz band. In this master thesis is proposed to study the design of different types of antennas and feeding mechanisms to increase the radiation efficiency.
openaire   +2 more sources

Acoustic phase imaging with terahertz radiation

Optics Express, 2007
We report on acoustic phase imaging of objects using terahertz radiation. The sensitivity of the technique is sufficient to detect objects at oscillation amplitudes down to about 300 nm. Such acoustic amplitudes are comparable to the human physiological perception level, which offers novel opportunities in security imaging.
Guillermo P. Acuna, F.F. Buersgens, Roland Kersting   +2 more
openaire   +3 more sources

Terahertz Oscillator Chips Backside-coupled to Unclad Microphotonics [PDF]

arXiv, 2022
Terahertz technology is largely dependent upon planar on-chip antennas that radiate downwards through the substrate, and so an effective means to interface these antennas with integrated waveguides is an attractive prospect. We present a viable methodology for backside coupling between a terahertz oscillator chip and a broadband all-intrinsic-silicon ...
arxiv  

Multifocal terahertz radiation by intense lasers in rippled plasma

, 2017
This paper presents a theoretical model for the generation of terahertz radiation by cosh-Gaussian laser beams of high intensity, which are capable of creating relativistic–ponderomotive nonlinearity. We find the components of the terahertz radiation for
Reenu Gill, Divya Singh, H. Malik
semanticscholar   +1 more source

Significant Radiation Enhancement in Photoconductive Terahertz Emitters by Incorporating Plasmonic Contact Electrodes [PDF]

, 2012
Even though the terahertz spectrum is well suited for chemical identification, material characterization, biological sensing and medical imaging, practical development of these applications has been hindered by the attributes of terahertz sources, namely low output power and poor efficiency. Here, we demonstrate that use of plasmonic contact electrodes
arxiv   +1 more source