Generation of scalable terahertz radiation from cylindrically focused two-color laser pulses in air
We demonstrate scalable terahertz (THz) generation by focusing terawatt, two-color laser pulses in air with a cylindrical lens. This focusing geometry creates a two-dimensional air plasma sheet, which yields two diverging THz lobe profiles in the far field. This setup can avoid plasma-induced laser...
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| Veröffentlicht in: | Applied physics letters 2016-03, Vol.108 (12) |
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| container_title | Applied physics letters |
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| creator | Kuk, D. Yoo, Y. J. Rosenthal, E. W. Jhajj, N. Milchberg, H. M. Kim, K. Y. |
| description | We demonstrate scalable terahertz (THz) generation by focusing terawatt, two-color laser pulses in air with a cylindrical lens. This focusing geometry creates a two-dimensional air plasma sheet, which yields two diverging THz lobe profiles in the far field. This setup can avoid plasma-induced laser defocusing and subsequent THz saturation, previously observed with spherical lens focusing of high-power laser pulses. By expanding the plasma source into a two-dimensional sheet, cylindrical focusing can lead to scalable THz generation. This scheme provides an energy conversion efficiency of 7 × 10{sup −4}, ∼7 times better than spherical lens focusing. The diverging THz lobes are refocused with a combination of cylindrical and parabolic mirrors to produce strong THz fields (>21 MV/cm) at the focal point. |
| doi_str_mv | 10.1063/1.4944843 |
| format | Article |
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| ispartof | Applied physics letters, 2016-03, Vol.108 (12) |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | AIR CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COLOR CYLINDRICAL CONFIGURATION EFFICIENCY FOCUSING LASERS LENSES MIRRORS PLASMA PLASMA SHEET PULSES SPHERICAL CONFIGURATION TWO-DIMENSIONAL SYSTEMS |
| title | Generation of scalable terahertz radiation from cylindrically focused two-color laser pulses in air |
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