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Proceedings Paper

Modeling distributed Bragg reflectors with superlattice materials for UV range
Author(s): Alexandru Zorila; Paul Schiopu
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Paper Abstract

Development of vertical cavity surface emitting lasers (VCSEL) is currently experiencing exponential growth. The main problem in achieving these lasers is the Bragg reflector that requires a large number of layers pairs with high contrast to obtain a high reflectivity DBR. But by increasing the number of layers and with the increase of contrast crack formation occurs due to the lattice mismatch between the different nitride compounds while keeping a large Refractive index contrast. By introducing a layer of superllatice (AlN)n/(GaN)n as one layer in the DBR pairs reduces lattice mismatch between the layers. Modeling was done using the self-consistent eight-band kp Schrödinger-Poisson solver. The refractive indices of these SLs were finally estimated for the design of an optimized high reflective Bragg mirror at 450 nm.

Paper Details

Date Published: 4 December 2010
PDF: 9 pages
Proc. SPIE 7821, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V, 78212B (4 December 2010); doi: 10.1117/12.883292
Show Author Affiliations
Alexandru Zorila, Politehnica Univ. of Bucharest (Romania)
Paul Schiopu, Politehnica Univ. of Bucharest (Romania)

Published in SPIE Proceedings Vol. 7821:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V
Paul Schiopu; George Caruntu, Editor(s)

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