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ZnSe/CaF2 quarter‐wave Bragg reflector for the vertical‐cavity surface‐emitting laser

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4 Author(s)
Lei, C. ; Microelectronics Research Center, Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712‐1084 ; Rogers, T.J. ; Deppe, D.G. ; Streetman, B.G.

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Data are presented on an electron‐beam evaporated ZnSe/CaF2 distributed Bragg reflector for use on a vertical‐cavity surface‐emitting laser operating at a wavelength ∼0.98 μm. Mirror characteristics are measured using optical transmission and reflectivity for quarter‐wave structures with varying numbers of pairs from one to five. The optical characteristics of the ZnSe/CaF2 quarter‐wave stack is compared to similar structures of electron‐beam evaporated Si/SiO2 reflectors. The ZnSe/CaF2 mirror is found to be superior to the Si/SiO2 mirror in terms of both higher reflectivity and lower optical loss for all structures investigated. Comparison is also made between ZnSe/CaF2 and Si/SiO2 mirrors in the continuous‐wave performance of AlAs‐GaAs‐InGaAs quantum‐well vertical‐cavity surface‐emitting lasers. Superior laser performance is achieved with the ZnSe/CaF2 mirror in terms of threshold current and lasing efficiency.

Published in:

Journal of Applied Physics  (Volume:69 ,  Issue: 11 )