搜索结果: 1-15 共查到“理学 terahertz”相关记录21条 . 查询时间(0.093 秒)
Wave of the future:Terahertz chips a new way of seeing through matter
Wave of the future Terahertz chips seeing through matter
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2017/3/13
Electromagnetic pulses lasting one millionth of a millionth of a second may hold the key to advances in medical imaging, communications and drug development. But the pulses, called terahertz waves, ha...
Chemists Create “Comb” that Detects Terahertz Waves with Extreme Precision
Chemists Comb Terahertz Waves Extreme Precision
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2015/4/29
Light can come in many frequencies, only a small fraction of which can be seen by humans. Between the invisible low-frequency radio waves used by cell phones and the high frequencies associated with i...
《Journal of Infrared Millimeter and Terahertz Waves》
Infrared Millimeter Terahertz Waves
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2013/10/8
New 2012 Impact Factor 1.120*The Journal of Infrared, Millimeter, and Terahertz Waves offers a peer-reviewed platform for the rapid dissemination of original, high-quality research in the frequency wi...
Terahertz generation by optical rectification in uniaxial birefringent crystals
Terahertz generation optical rectification uniaxial birefringent crystals Optics
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2012/5/28
The angular dependence of terahertz (THz) emission from birefringent crystals can differ significantly from that of cubic crystals. Here we consider optical rectification in uniaxial birefringent mate...
Waveform-Controlled Terahertz Radiation from the Air Filament Produced by Few-Cycle Laser Pulses
Waveform-Controlled Terahertz Radiation the Air Filament Few-Cycle Laser Pulses Optics
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2012/4/20
Waveform-controlled Terahertz (THz) radiation is of great importance due to its potential application in THz sensing and coherent control of quantum systems. We demonstrated a novel scheme to generate...
Grain-size-related transient terahertz mobility of femtosecond-laser-annealed polycrystalline silicon
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2011/12/12
We investigated carrier-relaxation dynamics of femtosecond laser annealed (FLA) polycrystalline silicon (poly-Si). The correlation between morphology and electrical properties of poly-Si after femtose...
Temperature performance analysis of terahertz quantum cascade lasers: Vertical versus diagonal designs
Temperature performance analysis terahertz quantum cascade lasers Vertical versus diagonal designs
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2011/9/14
Resonant phonon depopulation terahertz quantum cascade lasers based on vertical and diagonal lasing transitions are systematically compared using a well established ensemble Monte-Carlo approach. The ...
Modeling bound-to-continuum terahertz quantum cascade lasers: The role of Coulomb interactions
Modeling bound-to-continuum terahertz quantum cascade lasers Coulomb interactions
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2011/9/14
Based on an ensemble Monte Carlo analysis, we show that Coulomb interactions play a dominant role in boundto-continuum terahertz quantum cascade lasers and thus require careful modeling. Coulomb inter...
Monte Carlo study of carrier-light coupling in terahertz quantum cascade lasers
Monte Carlo carrier-light coupling terahertz quantum cascade lasers
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2011/9/14
We present a method for self-consistently including the optical cavity field into Monte Carlo-based carrier transport simulations. This approach allows for an analysis of the actual lasing operation i...
A Novel Device for Generating Terahertz Radiation Pulses
Terahertz Radiation Pulses Novel Device
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2011/9/1
The dynamics of a core-shell structured ionized particle between two parallel conductor plates,which is biased with a direct current (DC) voltage, have been investigated. It has been found that an ion...
Harmonics generation and intense terahertz radiation from polar molecules at multiphoton resonant excitation in laser fields
laser fields polar molecules Harmonics generation and intense terahertz radiation
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2011/9/1
The coherent radiation spectrum of two-level polar molecules with UV transition is studied at the multiphoton resonant excitation by a moderately strong laser field. The spectrum corresponding to harm...
Anisotropic ultrafast electron dynamics induced by high-field terahertz pulses in n-doped InGaAs
Anisotropic ultrafast electron dynamics high-field terahertz pulses
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2010/11/23
The anisotropic effective mass of electrons is directly measured using time-resolved THz-
pump/THz-probe techniques in a n-doped InGaAs semiconductor thin film. A microscopic theory
is used to attri...
Terahertz surface plasmons in optically pumped graphene structures
Terahertz surface plasmons optically pumped graphene structures
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2010/11/17
We analyze the surface plasmons (SPs) propagating along the optically pumped single-graphene
layer (SGL) and multiple-graphene layer (MGL) structures. It is shown that at sufficiently strong optical ...
Amplified Stimulated Terahertz Emission at Room temperature from Optically Pumped Graphene
Terahertz Emission Room temperature Optically Pumped Graphene
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2010/11/17
Room temperature Terahertz stimulated emission and population inversion in optically pumped graphene is reported. We experimentally observe fast relaxation and relatively slow recombination dynamics ...
Low-Temperature Dependences of the Polarization of Terahertz Emission from $n$-Germanium in Heating Electric Fields
Low-Temperature Dependences Polarization of Terahertz Emission Heating Electric Fields
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2010/11/19
As was noted in [3], in order to verify the assumption that the behavior of the polarization dependences of the terahertz emission by hot electrons from 𝑛-Ge is determined by the type of carri...