Size-selective two-photon spectroscopy of CuCl spherical quantum dots | Zendy

А. В. Баранов | Zendy; Yasuaki Masumoto | Zendy; Kuon Inoue | Zendy; A. V. Fëdorov | Zendy; A. A. Onushchenko | Zendy

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Size-selective two-photon spectroscopy of CuCl spherical quantum dots

Author(s) -

А. В. Баранов,

Yasuaki Masumoto,

Kuon Inoue,

A. V. Fëdorov,

A. A. Onushchenko

Publication year - 1997

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.55.15675

Subject(s) - exciton , excited state , luminescence , atomic physics , phonon , biexciton , excitation , spectroscopy , quantum dot , annihilation , physics , photoluminescence , photon , spectral line , molecular physics , materials science , condensed matter physics , optoelectronics , optics , quantum mechanics

We analyze luminescence spectra resulting from a resonant size-selective two-photon excitation of the low-energy confined Z3-exciton states in CuCl spherical nanocrystals. Excitation spectra of the two-photon-excited luminescence (TPL) bands and size dependences of band energies show that the TPL bands arise due to annihilation of the exciton in the lowest-energy state excited both directly and through the higher-energy confined states. It is shown that the oserved features of the TPL fine structure can be unambiguously interpreted in terms of longitudinal (L) and transverse (T) confined exciton states and resonant enhancement of phonon-assisted luminescence when the energy gap between 1S and 1P states of the T exciton is close to the LO-phonon energy

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