High-order harmonic generation in a plasma plume of<i>in situ</i>laser-produced silver nanoparticles
H. SinghalRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaR. A. GaneevInstitute of Electronics, 33, Dormon Yoli street, Tashkent 100125, UzbekistanP. A. NaikRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaJ. A. ChakeraRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaU. ChakravartyRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaH. VoraRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaArvind K. SrivastavaRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaC. MukherjeeRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaC. P. NavatheRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaS. K. DebRaja Ramanna Centre for Advanced Technology, Indore 452 013, IndiaP. D. GuptaRaja Ramanna Centre for Advanced Technology, Indore 452 013, India
2010en
ABI
Abstract
The results of the experimental study of high-order harmonic generation (HHG) from the interaction of 45-fs Ti:sapphire laser pulses with plasma plumes of Ag nanoparticles produced in situ are presented in this article. The nanoparticles were generated by the interaction of 300-ps, 20-mJ laser pulses with bulk silver targets at an intensity of $~1\ifmmode\times\else\texttimes\fi{}{10}^{13} \mathrm{W}/{\mathrm{cm}}^{2}$. The spectral characteristics of the HHG from nanoparticles produced in situ are compared with the HHG from monoparticle plasma plumes and with the HHG from preformed nanoparticle-containing plasma plumes. The cutoff harmonic order generated using the in situ silver nanoparticles is at the 21st harmonic order.
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