Q-factor measurements on planar nitride cavities

Conference item

To enable the study of cavity quantum electro-dynamical effects in nitride systems, it is essential to be able to fabricate high quality cavity structures that exhibit large Q-values of the order of several thousands. A promising candidate for such a realisation is based around the micro-pillar distributed Bragg reflector (DBR) cavity. The growth of nitride stacks is problematic due to such material issues as lattice mismatch and dislocation propagation which seem to be more pronounced when compared to similar arsenide structures. In this paper we report on our efforts to characterize the homogeneity of our first generation planar DBR structures through both reflectivity measurements using the broadband output of a photonic crystal fiber (PCF) and cryogenic photoluminescence under ultraviolet (UV) excitation. © 2010 Wiley-VCH Verlag GmbH and Co. KGaA.

Authors: Collins, D; Holmes, M; Taylor, R; Oliver, R; Kappers, M

• Publication status: Published
• Host title: PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 7, NO 7-8
• Volume: 7
• Issue: 7-8
• Pages: 1866-1868
• Publication date: 2010-01-01
• DOI: 10.1002/pssc.200983474
• EISSN: 1610-1642
• ISSN: 1862-6351
• Keywords: photoluminescence; reflectivity; reflectors; microactivity