| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Terahertz Radiation from Graphite Excited by Femtosecond Laser Pulses |
| WU Zhong-An, WU Xiao-Jun, WANG Li** |
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
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| Cite this article: |
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WU Zhong-An, WU Xiao-Jun, WANG Li 2014 Chin. Phys. Lett. 31 017801 |
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Abstract We experimentally investigate the terahertz (THz) generation from a graphite surface induced by femtosecond laser pulses, and systematically study the dependence on the excitation power, the crystal orientation of graphite, polarization state and incident angle of optical beam. New evidence related to excitation and detection geometry is found and presented, which supports the THz generation mechanism of transient photocarrier transporting along the basal plane normal. Our observation also suggests other probable contributions by in-plane charge oscillations. The results may be helpful to explore and understand the photoelectric properties of graphite and other allotropes of carbon.
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Received: 08 November 2013
Published: 28 January 2014
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| PACS: |
78.20.-e
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(Optical properties of bulk materials and thin films)
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78.90.+t
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(Other topics in optical properties, condensed matter spectroscopy and other interactions of particles and radiation with condensed matter)
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[17] Chinese patent pending (No 201210067482.3) |
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