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InGaN/GaN quantum well microcavities formed by laser lift-off and plasma etching

Edwards, P.R. and Martin, R.W. and Kim, H.S. and Kim, K.S. and Chen, Y. and Watson, I.M. and Sands, T. and Cheung, N.W. and Dawson, M.D. (2001) InGaN/GaN quantum well microcavities formed by laser lift-off and plasma etching. Physica Status Solidi B, 228 (1). pp. 91-94. ISSN 0370-1972

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Abstract

Photoluminescence measurements have been used to investigate InGaN/GaN quantum well microcavities formed between two dielectric Bragg reflectors. Both single and ten-period quantum wells emitting near 420 nm were studied. The structures were formed using a combination of MOCVD growth for the nitride layers, laser lift-off to remove the sapphire substrates and electron-beam evaporation to deposit the mirrors. Room temperature photoluminescence measurements have been used to investigate the cavity modes observed from both plasma etched and unetched microcavities, and half widths as low as 0.6 meV were observed. The cavity modes were visible as dips in measured reflectance spectra and as peaks in the PL. Comparison of the mode wavelengths with simulated reflectivity spectra has allowed the determination of the cavity thickness before and after etching; this has shown the etch-back step to have a degree of control (±5%) necessary for the later fabrication of resonant periodic gain structures.

Item type: Article
ID code: 23623
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: photoluminescence measurement, InGaN/GaN, quantum well microcavities, dielectric Bragg reflectors, Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Faculty of Science > Institute of Photonics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 08 Jul 2010 11:45
    Last modified: 12 Mar 2012 11:14
    URI: http://strathprints.strath.ac.uk/id/eprint/23623

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