| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Cavity-Defect Plasma Bragg Gratings |
ZHENG Jun1, SHENG Zheng-Ming1,2, YE Zhi-Cheng3, ZHANG Jie1,2, MIMA Kunioki4 |
| 1Department of Physics, Shanghai Jiao Tong University,Shanghai 2002402Laboratory of Optical Physics, Institute of Physics, Chinese Academyof Sciences, Beijing 1001903School of Electronic, Information and Electrical Engineering, ShanghaiJiao Tong University, Shanghai 2002404Institute of Laser Engineering, Osaka University, Osaka 565-0871,Japan |
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| Cite this article: |
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ZHENG Jun, SHENG Zheng-Ming, YE Zhi-Cheng et al 2010 Chin. Phys. Lett. 27 045202 |
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Abstract Plasma Bragg grating (PBG) is composed of periodic variations of plasma and dielectric or vacuum. The defect mode characteristic of the PBG with a cavity-defect is studied by one-dimensional particle-in-cell (1D PIC) simulation. It is shown that the laser pulse with the defect frequency can be localized around the defect partly and at the same time leak out of both sides of the grating slowly because of the few number of the grating period. This results in local high laser field intensity and high plasma density produced at the defect area, from which the third harmonic is enhanced by one order of magnitude. With the enhancement of the light coupled to the defect and the decrease of the light leaking out of the defect, the conversion efficiency of the third harmonic from the incident laser can be increased.
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| Keywords:
52.25.Os
52.35.Mw
52.59.Ye
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Received: 14 October 2009
Published: 27 March 2010
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| PACS: |
52.25.Os
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(Emission, absorption, and scattering of electromagnetic radiation ?)
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52.35.Mw
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(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
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52.59.Ye
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(Plasma devices for generation of coherent radiation ?)
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