Harmonic generation from indium-rich plasmas

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R. A. Ganeev,² H. Singhal,¹ P. A. Naik,¹ V. Arora,¹ U. Chakravarty,¹ J. A. Chakera,¹ R. A. Khan,¹ I. A. Kulagin,² P. V. Redkin,³ M. Raghuramaiah,¹ and P. D. Gupta¹
¹Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India
²Akadempribor Scientific Association, Academy of Sciences of Uzbekistan, Tashkent 700125, Uzbekistan
³Samarkand State University, Samarkand 703004, Uzbekistan

Received 27 April 2006; revised 8 September 2006; published 21 December 2006

Anexperimental study of high-order harmonic generation in In, InSb, InP,and InGaP plasmas using femtosecond laser radiation with variable chirpis presented. Intensity enhancement of the 13th and 21st harmonicscompared to the neighboring harmonics by a factor of 200and 10, respectively, is observed. It is shown that theharmonic spectrum from indium-containing plasma plumes can be considerably modifiedby controlling the chirp of the driving laser pulse.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.74.063824
DOI:	10.1103/PhysRevA.74.063824
PACS:	42.65.Ky; 42.79.Nv; 52.38.Mf 42.65.Ky Optical frequency conversion; optical harmonic generation, including higher-order harmonic generation 42.79.Nv Optical frequency converters 52.38.Mf Laser ablation YEAR: 2006
KEYWORDS:	indium, indium compounds, gallium compounds, optical harmonic generation, laser beam effects, plasma interactions, chirp modulation

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