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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
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...
Third and fifth harmonics generation by tightly focused femtosecond pulses at 2.2 μm wavelength in air
harmonics focused femtosecond pulses
2011/9/6
We report experiments on the generation of third and fifth harmonics of millijoule-level, tightly focused, femtosecond laser pulses at 2.2 μm wavelength in air. The measured ratio of yields of the thi...
Spectral dependence of purely-Kerr driven filamentation in air and argon
Spectral dependence purely-Kerr driven filamentation argon
2010/11/16
Based on numerical simulations, we show that higher-order nonlinear indices (up to $n_8$ and $n_{10}$, respectively) of air and argon have a dominant contribution to both focusing and defocusing in t...
An updated search of steady TeV γ-ray point sources in northern hemisphere using the Tibet air shower array
ASγ experiment γ-ray point sources 90% C.L. flux pper limits
2009/8/17
Using the data taken from Tibet II High Density (HD) Array (1997 February—1999 September) and Tibet-III array (1999 November—2005 November), our previous northern sky survey for TeV γ-ray point source...
Air Moisture Sensing Properties of ZnCr2O4--K2CrO4 Composites
relative humidity constant phase elements X-rays
2010/4/12
Crystalline structure, surface morphology and the response to air moisture of ceramic system of composition ZnCr2O4 - KrCrO4 formed by solid state reaction at elevated temperatures were investigated. ...