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Proceedings Paper

Investigation of the laser cooling cycle in the time domain (Conference Presentation)
Author(s): Jan F. Schmidt; Timo Raab; Jannis Oelmann; Denis V. Seletskiy
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Paper Abstract

Upon excitation of a material below its fundamental transition, cooling of the lattice results if the subsequent emission is predominantly radiative. Despite overwhelming experimental success, it remains a challenge to understand the microscopic nature of detrimental processes that can even prevent cooling. We apply ultrafast spectroscopy to resolve the laser refrigeration cycle in the time domain. Strong evidence for lattice cooling on picosecond timescales in bulk GaAs/InGaP double-heterostructures and GaAs/AlGaAs quantum wells establishes the non-local nature of the parasitic mechanisms. Further precision measurements investigating long-time dynamics are currently underway to resolve detrimental heating in bulk GaAs for the first time.

Paper Details

Date Published:
PDF: 1 pages
Proc. SPIE 10121, Optical and Electronic Cooling of Solids II, 101210G; doi: 10.1117/12.2251938
Show Author Affiliations
Jan F. Schmidt, Univ. Konstanz (Germany)
Timo Raab, Univ. Konstanz (Germany)
Jannis Oelmann, Univ. Konstanz (Germany)
Denis V. Seletskiy, Univ. Konstanz (Germany)


Published in SPIE Proceedings Vol. 10121:
Optical and Electronic Cooling of Solids II
Richard I. Epstein; Denis V. Seletskiy; Mansoor Sheik-Bahae, Editor(s)

Video Presentation

Investigation-of-the-laser-cooling-cycle-in-the-time-domain



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