Carbon aerogel plumes as an efficient medium for higher harmonic generation in the 40–90 nm range
R. A. GaneevRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaP. A. NaikRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaJ. A. ChakeraRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaH. SinghalRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaNimai Chand PramanikCentre for Materials for Electronics Technology, Thrissur 680581, IndiaP.A. AbrahamCentre for Materials for Electronics Technology, Thrissur 680581, IndiaNarayanapanicker Rani PanickerCentre for Materials for Electronics Technology, Thrissur 680581, IndiaM. KumarRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaParshotam Dass GuptaRaja Ramanna Centre for Advanced Technology, Indore 452013, India
2011en
ABI
Abstract
We have performed a study on the preparation, characterization, and high-order harmonic generation (HHG) of a femtosecond laser in carbon aerogel plasma plumes. A higher conversion of the femtosecond laser radiation into HHG in the range of 40–90 nm is observed, as compared to that in plasma plumes of silver and C60 targets, where the highest conversion efficiency has been previously reported. Next, the application of a two-color pump scheme allowed further enhancement of the harmonic yield compared to a single-color pump scheme in the carbon aerogel, for both odd and even harmonics. The conversion efficiency from the carbon aerogel plasma was estimated at not less than 5×10−5.
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