Enhanced light outcoupling in microdisk lasers via Si spherical nanoantennas

High-index dielectric (Si) nanoantennas providing outcoupling of light from InAs/Ga(Al)As quantum dot (QD) microdisk lasers have been designed. The spatial distribution of light emitted from optically pumped QD microdisk lasers with a single Si spherical nanoantenna placed on the top surface of the...

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Bibliographic Details
Published in:Journal of applied physics 2018-10, Vol.124 (16)
Main Authors: Kryzhanovskaya, N., Polubavkina, Yu, Moiseev, E., Maximov, M., Zhurikhina, V., Scherbak, S., Lipovskii, A., Kulagina, M., Zadiranov, Y., Mukhin, I., Komissarenko, F., Bogdanov, A., Krasnok, A., Zhukov, A.
Format: Article
Language:English
Subjects:
Aluminum
Applied physics
Electromagnetic fields
Emission analysis
Laser modes
Lasers
Nanoantennas
Nanospheres
Optical microscopy
Q factors
Quantum dots
Silicon
Spatial distribution
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Summary:High-index dielectric (Si) nanoantennas providing outcoupling of light from InAs/Ga(Al)As quantum dot (QD) microdisk lasers have been designed. The spatial distribution of light emitted from optically pumped QD microdisk lasers with a single Si spherical nanoantenna placed on the top surface of the microdisk was studied experimentally by confocal optical microscopy. Dependences of the emission intensity on the size and position of the Si nanoantenna were investigated. It was found that the laser mode to be outcoupled can be selected by choosing the nanosphere position with respect to the mode electromagnetic field maximum. Optimization of the Si nanoantenna parameters resulted in a 23-fold increase of the emission intensity at the location of the Si nanoantenna (whereas the total intensity enhanced 4 times) compared to the emission intensity from the initial microdisk laser without significant deterioration of the resonator quality factor.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5046823