We report on experimental and theoretical studies of the polarization selection rules of the emission of non-polar GaN/AlN self-assembled quantum dots. Time-integrated and time-resolved photoluminescence measurements have been performed to determine the degree of polarization. It is found that the emission of some samples can be predominantly polarized parallel to the wurtzite c axis, in striking difference with the previously reported results for bulk GaN and its heterostructures, in which the emission was preferentially polarized perpendicular to the c axis. Theoretical calculations based on an 8-band k·p model are used to analyze the relative importance of strain, confinement and quantum dot shape on the polarization selection rules.

Anisotropic polarization of non-polar GaN quantum dot emission / Mata, R.; Garro, N.; Cros, A.; Budagosky, J. A.; García Cristóbal, A.; Vinattieri, Anna; Gurioli, Massimo; Founta, S.; Bellet Amalric, E.; Daudin, B.. - In: PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS. - ISSN 1862-6351. - STAMPA. - 6:(2009), pp. S541-S544. [10.1002/pssc.200880868]

Anisotropic polarization of non-polar GaN quantum dot emission

VINATTIERI, ANNA;GURIOLI, MASSIMO;
2009

Abstract

We report on experimental and theoretical studies of the polarization selection rules of the emission of non-polar GaN/AlN self-assembled quantum dots. Time-integrated and time-resolved photoluminescence measurements have been performed to determine the degree of polarization. It is found that the emission of some samples can be predominantly polarized parallel to the wurtzite c axis, in striking difference with the previously reported results for bulk GaN and its heterostructures, in which the emission was preferentially polarized perpendicular to the c axis. Theoretical calculations based on an 8-band k·p model are used to analyze the relative importance of strain, confinement and quantum dot shape on the polarization selection rules.
6
S541
S544
Mata, R.; Garro, N.; Cros, A.; Budagosky, J. A.; García Cristóbal, A.; Vinattieri, Anna; Gurioli, Massimo; Founta, S.; Bellet Amalric, E.; Daudin, B.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/359376
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