Journal
PHYSICAL REVIEW B
Volume 84, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.115315
Keywords
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Funding
- NCCR Quantum Photonics
- Swiss National Science Foundation (SNSF)
- SNSF [200020-113542]
- EU-project Clermont4 [FP7-235114]
- European Regional Development Fund [POIG.01.01.02-00-008/08]
- Polish Ministry of Science and Higher Education [N-N202-010134]
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We present a comprehensive study of the anisotropic optical properties of nonpolar GaN/AlGaN multiple quantum wells intentionally designed to act as an active region of a planar microcavity operating in the strong-coupling regime. The strain induced by the underlying AlGaN-based Bragg reflector leads to a redistribution of exciton oscillator strength as revealed by photoluminescence and reflectivity measurements. Complementary k . p calculations show an excellent agreement with experiments and emphasize the opportunity to tune the nature of the light-matter coupling in a microcavity by means of strain engineering. Finally, the validity of the developed model is proven by angle-resolved photoluminescence studies carried out on the complete microcavity structure. The recorded eigenmode spectra reveal the coexistence of the weak- and the strong-coupling regime along the two orthogonal polarization planes.
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