scholarly journals High-Order Harmonic Generation in Au Nanoparticle-Contained Plasmas

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 234 ◽  
Author(s):  
Mottamchetty Venkatesh ◽  
Rashid A. Ganeev ◽  
Dmitry S. Ivanov ◽  
Ganjaboy S. Boltaev ◽  
Vyacheslav V. Kim ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
Au Nanoparticle ◽  
High Order Harmonic Generation ◽  
Dynamic Simulations ◽  
Au Nps ◽  
Glass Substrates ◽  
High Order Harmonic ◽  
Wide Range ◽  
Gold Nps

Gold nanoparticles (NPs) have a wide range of applications in various fields. Here, we present high-order nonlinear optical studies of the plasmas produced from ablation of Au bulk targets and Au NP films deposited on paper and glass substrates. Experimentally, we analyze high-order harmonic generation (HHG) from gold NPs-containing plasmas. The HHG is produced by 35-fs pulses at 800 and 400 nm, while the plasmas are produced by femtosecond (35 fs, 800 nm), picosecond (200 ps, 800 nm), and nanosecond (5 ns, 1064 nm) pulses, respectively. High-order harmonics produced from ablated Au NPs on paper were 40 times stronger than the HHG from that ablated from the Au bulk targets. Through molecular dynamic simulations, we investigate the formation of gold NPs during laser ablation of a metal surface under different conditions.

HIGH-ORDER HARMONIC GENERATION IN DIATOMIC MOLECULES: QUANTUM INTERFERENCE, NODAL STRUCTURES AND MULTIPLE ORBITALS

2012 ◽  
Vol 26 (02) ◽  
pp. 1130002 ◽  
Author(s):  
B. B. AUGSTEIN ◽  
C. FIGUEIRA DE MORISSON FARIA
Keyword(s):  
Molecular Orbital ◽  
Harmonic Generation ◽  
Quantum Interference ◽  
Strong Field ◽  
Diatomic Molecules ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic ◽  
Wide Range ◽  
Heteronuclear Molecules

We present a summarizing account of a series of investigations of high-order harmonic generation (HHG) in diatomic molecules beyond the single-active electron and single-active orbital approximation. In these investigations, we include not only the highest occupied molecular orbital (HOMO), but also the lower lying orbitals and the lowest unoccupied molecular orbital (LUMO) in modified versions of the strong-field approximation. We employ perturbation theory around the HOMO, multielectron wavefunctions and initial coherent superpositions of the HOMO and LUMO. The imprints of multiple orbitals, nodal structures and two-center interference on the HHG spectra are investigated in detail, for homonuclear and heteronuclear molecules. We find that, in many situations, different molecular orbitals can be traced back to different energy regions in the spectra. Furthermore, imprints of nodal structures in heteronuclear molecules can be understood by analyzing nodal planes in isoelectronic homonuclear molecules. This opens up a wide range of possibilities for molecular imaging applications.

Relativistic high-order harmonic generation

2003 ◽  
Vol 50 (3-4) ◽  
pp. 375-386
Author(s):  
D. B. MilosÕeviĆ ◽  
W. Becker
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic

scholarly journals High-order harmonic generation in laser-produced ions using a near-infrared laser

1995 ◽  
Vol 51 (1) ◽  
pp. 585-591 ◽  
Author(s):  
C.-G. Wahlström ◽  
S. Borgström ◽  
J. Larsson ◽  
S.-G. Pettersson
Keyword(s):  
Harmonic Generation ◽  
Near Infrared ◽  
Infrared Laser ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic
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