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Title: Resolved-sideband Raman cooling of an optical phonon in semiconductor materials
Authors: Zhang, Jun
Zhang, Qing
Wang, Xingzhi
Kwek, Leong Chuan
Xiong, Qihua
Keywords: Science::Physics
Issue Date: 2016
Source: Zhang, J., Zhang, Q., Wang, X., Kwek, L. C., & Xiong, Q. (2016). Resolved-sideband Raman cooling of an optical phonon in semiconductor materials. Nature Photonics, 10(9), 600-605. doi:10.1038/nphoton.2016.122
Journal: Nature Photonics
Abstract: The radiation pressure of light has been widely used to cool trapped atoms or the mechanical vibrational modes of optomechanical systems. Recently, by using the electrostrictive forces of light, spontaneous Brillouin cooling and stimulated Brillouin excitation of acoustic modes of the whispering-gallery-type resonator have been demonstrated. The laser cooling of specific lattice vibrations in solids (that is, phonons) proposed by Dykman in the late 1970s, however, still remains sparsely investigated. Here, we demonstrate the first strong spontaneous Raman cooling and heating of a longitudinal optical phonon (LOP) with a 6.23 THz frequency in polar semiconductor zinc telluride nanobelts. We use the exciton to resonate and assist photoelastic Raman scattering from the LOPs caused by a strong exciton-LOP coupling. By detuning the laser pump to a lower (higher) energy-resolved sideband to make a spontaneous scattering photon resonate with an exciton at an anti-Stokes (Stokes) frequency, the dipole oscillation of the LOPs is photoelastically attenuated (enhanced) to a colder (hotter) state.
ISSN: 1749-4885
DOI: 10.1038/nphoton.2016.122
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
National Institute of Education 
Organisations: CNRS-UNS-NUS-NTU International Joint Research Unit
Nanoelectronics Center of Excellence
Research Centres: Institute of Advanced Studies 
Rights: © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. This paper was published in Nature Photonics and is made available with permission of Macmillan Publishers Limited, part of Springer Nature.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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