LO Phonon Renormalization in Optically Excited CuCl Nanocrystals | Zendy

Lev Zimin | Zendy; Selvakumar V. Nair | Zendy; Yasuaki Masumoto | Zendy

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LO Phonon Renormalization in Optically Excited CuCl Nanocrystals

Author(s) -

Lev Zimin,

Selvakumar V. Nair,

Yasuaki Masumoto

Publication year - 1998

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.80.3105

Subject(s) - phonon , excited state , exciton , sideband , nanocrystal , renormalization , absorption (acoustics) , materials science , absorption spectroscopy , spectroscopy , condensed matter physics , atomic physics , physics , molecular physics , optics , nanotechnology , quantum mechanics , microwave , composite material

We have revealed sharp structures in the absorption spectrum of CuCl nanocrystals using persistent hole-burning spectroscopy and observed sidebands due to phonon-assisted absorption. The LO phonon frequency in the excited state of the nanocrystal is reduced by about 10% from the free value due to mixing with the exciton. When the mixing becomes resonant, the phonon sideband anticrosses with the excited exciton state. We present a theory of the phonon renormalization in nanocrystals and obtain results in excellent agreement with the experiment

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