scholarly journals Simplified formulas for the generation of terahertz waves from semiconductor surfaces excited with a femtosecond laser

2020 ◽  
Vol 127 (24) ◽  
pp. 245703 ◽  
Author(s):  
Masayoshi Tonouchi
Keyword(s):  
Femtosecond Laser ◽  
Semiconductor Surfaces ◽  
Terahertz Waves

Femtosecond laser color marking of metal and semiconductor surfaces

2012 ◽  
Vol 107 (2) ◽  
pp. 301-305 ◽  
Author(s):  
Andrey A. Ionin ◽  
Sergey I. Kudryashov ◽  
Sergey V. Makarov ◽  
Leonid V. Seleznev ◽  
Dmitry V. Sinitsyn ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Semiconductor Surfaces

Realization of ∼10 nm Features on Semiconductor Surfaces via Femtosecond Laser Direct Patterning in Far Field and in Ambient Air

Nano Letters ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 4947-4952 ◽  
Author(s):  
Zhenyuan Lin ◽  
Huagang Liu ◽  
Lingfei Ji ◽  
Wenxiong Lin ◽  
Minghui Hong
Keyword(s):  
Femtosecond Laser ◽  
Ambient Air ◽  
Semiconductor Surfaces ◽  
Far Field ◽  
Direct Patterning

scholarly journals Broadband Anisotropy in Terahertz Metamaterial With Single-Layer Gap Ring Array

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2255 ◽  
Author(s):  
Liangping Xia ◽  
Hong-Liang Cui ◽  
Man Zhang ◽  
Suihu Dang ◽  
Chunlei Du
Keyword(s):  
Femtosecond Laser ◽  
Theoretical Prediction ◽  
Time Domain ◽  
Single Layer ◽  
Terahertz Waves ◽  
System A ◽  
Resonant Modes ◽  
Metallic Ring ◽  
Terahertz Transmission ◽  
Anisotropic Metamaterial

To convert the polarization of terahertz waves pumped by a femtosecond laser in a terahertz time domain system, a broadband anisotropic metamaterial is proposed. The metamaterial is constructed with a single-layer gapped metallic ring array, which supports different resonant modes in orthogonal directions. With the aid of simulations and measurements, the anisotropy of the terahertz transmission is demonstrated and discussed. The experimental results of THz transmission in the metamaterial indicate that the anisotropic band is as wide as 0.56 THz, which accords well with our theoretical prediction.

scholarly journals Enhancement of terahertz waves from two-color laser-field induced air plasma excited using a third-color femtosecond laser

2020 ◽  
Vol 28 (14) ◽  
pp. 20598 ◽  
Author(s):  
Danni Ma ◽  
Liquan Dong ◽  
Minghao Zhang ◽  
Tong Wu ◽  
Yuejin Zhao ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Field ◽  
Air Plasma ◽  
Terahertz Waves

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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