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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Otsuka, T. Suzuki, F. Nakata, M. Kasama, J. Higashiguchi, T. Yugami, N. Kodama, R. |
| Copyright Year | 2010 |
| Description | Author affiliation: Graduate School of Engineering and Center for Optical Research and Education (CORE), Utsunomiya, University, Utsunomiya, 321-8585, Japan (Otsuka, T.; Suzuki, F.; Nakata, M.; Kasama, J.; Higashiguchi, T.; Yugami, N.) || Graduate School of Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan (Kodama, R.) |
| Abstract | When plasmas are instantaneously created around an electromagnetic wave, frequency of the wave up-converted to the frequency, which depends on the plasma frequency. This phenomenon is called as the flash-ionization. The theory requires the plasma creation in time much shorter than an oscillation period of the electromagnetic wave. We have demonstrated the proof of principle experiment using the interaction between a terahertz wave and plasmas created by an ultrashort laser pulse, which ensures the plasma creation time-scale much shorter than a period of electromagnetic source wave. We observed frequency up-conversion from 0.2 THz to 0.7–1.5 THz by the irradiance of the laser in ZnSe crystal. The up-conversion to the broad frequencies suggests that the flash ionization occurs in non-uniform plasmas produced in the deeper region of the crystal. |
| Starting Page | 1 |
| Ending Page | 2 |
| File Size | 768489 |
| Page Count | 2 |
| File Format | |
| ISBN | 9781424466559 |
| e-ISBN | 9781424466573 |
| DOI | 10.1109/ICIMW.2010.5612427 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-09-05 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Plasmas Ionization Laser excitation Pump lasers Measurement by laser beam Crystals Laser theory |
| Content Type | Text |
| Resource Type | Article |
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