Radiative cooling of bulk silicon by incoherent light pump

Autor:	V. K. Malyutenko, V. V. Bogatyrenko, O. Yu. Malyutenko
Rok vydání:	2013
Předmět:	Materials science Photon Physics and Astronomy (miscellaneous) Radiative cooling business.industry Physics::Optics Laser pumping law.invention Optical pumping Optics Semiconductor Thermal radiation law Optoelectronics Luminescence business Light-emitting diode
Zdroj:	Applied Physics Letters. 103:261106
ISSN:	1077-3118 0003-6951
Popis:	In contrast to radiative cooling by light up conversion caused exclusively by a low-entropy laser pump and employing thermally assisted fluorescence/luminescence as a power out, we demonstrate light down conversion cooling by incoherent pumps, 0.47–0.94 μm light emitting diodes, and employing thermal emission (TE) as a power out. We demonstrate ≤3.5 K bulk cooling of Si at 450 K because overall energy of multiple below bandgap TE photons exceeds the energy of a single above bandgap pump photon. We show that using large entropy TE as power out helps avoid careful tuning of an incoherent pump wavelength and cool indirect-bandgap semiconductors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ed5c9274e05d0fc6b56e959c33fd9b03 https://doi.org/10.1063/1.4855395 Zobrazit plný text záznamu