Generation of Reflected Second Harmonic at Semiconductor Quantum Dots

Generation of the reflected second harmonic has been observed for the first time in a composite material: a glass matrix containing microscopic CdSe crystals, ranging in size from 500 to 50 Å. The violation of polarization selection rules in the second-harmonic generation indicates that the nonlinea...

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Bibliographic Details
Published in:JETP letters 2023-12, Vol.118 (Suppl 1), p.S2-S5
Main Authors: Aktsipetrov, O. A., Nikulin, A. A., Ekimov, A. I.
Format: Article
Language:English
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Cadmium selenides
Composite materials
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum dots
Quantum Information Technology
Second harmonic generation
Size effects
Solid State Physics
Spintronics
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Summary:Generation of the reflected second harmonic has been observed for the first time in a composite material: a glass matrix containing microscopic CdSe crystals, ranging in size from 500 to 50 Å. The violation of polarization selection rules in the second-harmonic generation indicates that the nonlinear sources are of a fluctuational nature. A size effect has also been observed: The intensity of the second harmonic increases by a factor of 102 as the size of the microscopic crystals is reduced. A possible mechanism for this size effect is analyzed.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364023130015