Results 11 to 20 of about 1,207,154 (235)

Intracavity terahertz optical parametric oscillators [PDF]

, 2011
This thesis describes the design and implementation of several novel, nanosecond pulsed, intracavity optical parametric oscillators for the generation of terahertz radiation.
Walsh, David A.
core   +2 more sources

Superhydrophobic polytetrafluoroethylene surfaces with accurately and continuously tunable water adhesion fabricated by picosecond laser direct ablation

Materials & Design, 2019
Superhydrophobic polytetrafluoroethylene (PTFE) surfaces with accurately and continuously tunable water adhesion were fabricated by a simple and rapid method of picosecond (ps) laser direct ablation.
Zhongli Qin, Jun Ai, Qifeng Du, Jianguo Liu, Xiaoyan Zeng   +4 more
doaj   +1 more source

Strong polarization-controlled terahertz generation by bi-elliptical polarized laser fields

Frontiers in Physics, 2023
Terahertz generation from atoms driven by two color linearly polarized (LP) and circularly polarized (CP) laser fields have been well investigated. In this work, based on the photocurrent model, we investigate theoretically the intensity and polarization
Yan-Mei Liu, Ya-Ning Li, Lei Zhang, Zhi-Hong Jiao, Song-Feng Zhao, Guo-Li Wang   +5 more
doaj   +1 more source

Ultrafast control of polarization of terahertz generation from laser–gas interaction using orthogonal few-cycle double-pulse lasers [PDF]

AIP Advances
The effect of orthogonal few-cycle double-pulse laser parameters on the terahertz polarization states generated from laser-driven gas plasma is investigated.
Xue Liu, Jin-Xu Du, Lei Zhang, Zhi-Hong Jiao, Song-Feng Zhao, Guo-Li Wang   +5 more
doaj   +1 more source

Stimulated terahertz emission due to electronic Raman scattering in silicon [PDF]

, 2009
Silicon-based semiconductors are intensively investigated over the past years as promising candidates for optoelectronic devices at terahertz (THz) frequencies [1]. Optically pumped intracenter silicon lasers, realized in the past decade in the THz range,
Pavlov, S.G., Hubers, H. W., Riemann, H., Hübers, H.-W., van der Meer, A.F.G., H. Riemann, R. Kh. Zhukavin, Redlich, B., Pavlov, S.G. (author), Böttger, U. (author), Abrosimov, N.V. (author), J. N. Hovenier, Abrosimov, N.V., Hübers, H.W. (author), Hübers, H.W., V. N. Shastin, Pavlov, S. G., Hovenier, J.N. (author), Böttger, U., Abrosimov, N. V., Shastin, V. N., Shastin, V.N., U. Böttger, N. V. Abrosimov, S. G. Pavlov, Zhukavin, R. K., Redlich, B. (author), Zhukavin, R.K., Hovenier, J. N., B. Redlich, Hovenier, J.N., Zhukavin, R.K. (author), A. F. G. van der Meer, Zhukavin, R.Kh., Van der Meer, A.F.G. (author), H.-W. Hübers, Shastin, V.N. (author), van der Meer, A. F. G., Riemann, H. (author)   +38 more
core   +2 more sources

Fast Terahertz Computed-Tomography Imaging With a Quantum-Cascade Laser and a Scanning Mirror [PDF]

, 2013
A terahertz transmission imaging system based on a quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector is demonstrated. In order to reduce artifacts, special care was taken on the optics and the conversion of the measured
H.-W. Hubers, H. Richter, Richter, Heiko, Schrottke, Lutz, Grahn, H. T., Hübers, Heinz-Wilhelm, Wienold, Martin, Rothbart, Nick, M. Wienold, L. Schrottke, H. T. Grahn, N. Rothbart   +11 more
core   +1 more source

Laser Processing of Transparent Wafers with a AlGaN/GaN Heterostructures and High-Electron Mobility Devices on a Backside

Micromachines, 2021
Sapphire and silicon carbide substrates are used for growth of the III-N group heterostructures to obtain the electronic devices for high power and high frequency applications.
Simonas Indrišiūnas, Evaldas Svirplys, Justinas Jorudas, Irmantas Kašalynas   +3 more
doaj   +1 more source

A compact, continuous-wave terahertz source based on a quantum-cascade laser and a miniature cryocooler [PDF]

, 2010
We report on the development of a compact, easy-to-use terahertz radiation source, which combines a quantum cascade laser (QCL) operating at 3.1 THz with a compact, low input-power Stirling cooler.
Semenov, Alexey, Richter, Heiko, Schrottke, Lutz, Grahn, H. T., Giehler, M., Wienold, Martin, Huebers, H.-W., Pavlov, Sergey, Greiner-Bär, Michael, Hey, R., Semenov, Alexei D.   +10 more
core   +1 more source

A micromechanical beam-steering device for terahertz systems [PDF]

, 2004
Beam-steering techniques are required to fully exploit terahertz imaging systems. We propose and model a device employing artificial dielectric techniques to provide a variable phase-control medium.
David R. S. Cumming, Timothy D. Drysdale, Drysdale, T.D., Cumming, D.R.S.   +3 more
core   +2 more sources

Control of transverse mode content and polarization structure of terahertz coherent beams [PDF]

Компьютерная оптика, 2019
The paper is devoted to investigation of forming multimode coherent beams of terahertz radiation with pre-given transverse mode content and terahertz vector beams by use of silicon diffractive optical elements forming single modes from terahertz free ...
Vladimir Pavelyev, Yuliya Choporova, Boris Knyazev, Natalya Osintseva, Konstantin Tukmakov   +4 more
doaj   +1 more source