Modeling distributed Bragg reflectors with superlattice materials for UV range

Alexandru Zorila; Paul Schiopu

doi:10.1117/12.883292

4 December 2010 Modeling distributed Bragg reflectors with superlattice materials for UV range

Alexandru Zorila, Paul Schiopu

Proceedings Volume 7821, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V; 78212B (2010) https://doi.org/10.1117/12.883292
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies, 2010, Constanta, Romania

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.

Citation Download Citation

Alexandru Zorila and Paul Schiopu "Modeling distributed Bragg reflectors with superlattice materials for UV range", Proc. SPIE 7821, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V, 78212B (4 December 2010); https://doi.org/10.1117/12.883292

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