|
EPrints@IIT Delhi >
Faculty Research Publicatons >
Physics >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/2074/2028
|
| Title: | Second-harmonic generation of a Gaussian laser beam in a self created magnetized plasma channel |
| Authors: | Salih, H A
Tripathi, V K
Pandey, B K |
| Keywords: | radial ponderomotive force
electron cyclotron
azimuthally asymmetric |
| Issue Date: | 2003 |
| Citation: | Plasma Science, IEEE Transactions on, 31(3), 324 - 328p. |
| Abstract: | The second-harmonic generation of an intense self-guided right circularly polarized laser beam in a magnetized plasma is investigated. The laser imparts oscillatory velocity to electrons and exerts a radial ponderomotive force on them to create a depleted density channel. The critical power for self-focusing shows huge reduction as electron cyclotron frequency approaches the laser frequency (/spl omega//sub c/ /spl rarr/ /spl omega/). In the presence of the self-created radial density gradient, the laser drives a density perturbation at the fundamental frequency. The density perturbation beats with the oscillatory velocity to produce a second harmonic current density, driving second harmonic radiation copropagating with the laser. The second harmonic, however, is azimuthally asymmetric with /spl theta/-variation as exp(i/spl theta/). Its amplitude shows resonant enhancement as /spl omega//sub c/ /spl rarr/ /spl omega/. |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/2028 |
| Appears in Collections: | Physics
|
Files in This Item:
| File |
Description |
Size | Format |
|---|
| salihsec2003.pdf | | 107Kb | Adobe PDF | View/Open |
|
Show full item record
All items in DSpace are protected by copyright, with all rights reserved.
|
