Second harmonic generation from direct band gap quantum dots pumped by femtosecond laser pulses

Journal Article · Fri Feb 21 04:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4865956· OSTI ID:22278045

Liu, Liwei; Wang, Yue; Hu, Siyi; Ren, Yu; Huang, Chen ^[1]

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1. School of Science, Changchun University of Science and Technology, Changchun, Jilin 130022, People's Republic of China and International Joint Research Center for Nanophotonics and Biophotonics, Changchun University of Science and Technology, Changchun, Jilin 130022 (China)

We report on nonlinear optical experiments performed on Cu{sub 2}S quantum dots (QDs) pumped by femtosecond laser pulses. We conduct a theoretical simulation and experiments to determine their second harmonic generation characteristics. Furthermore, we demonstrate that the QDs have a second harmonic generation conversion efficiency of up to 76%. Our studies suggest that these Cu{sub 2}S QDs can be used for solar cells, bioimaging, biosensing, and electric detection.

• OSTI ID: 22278045
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
COMPUTERIZED SIMULATION
COPPER SULFIDES
ELECTRONIC STRUCTURE
ENERGY GAP
HARMONIC GENERATION
LASER RADIATION
PULSED IRRADIATION
QUANTUM DOTS
SOLAR CELLS