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Green monolithic II–VI vertical‐cavity surface‐emitting laser operating at room temperature
Author(s) -
Kruse C.,
Ulrich S. M.,
Alexe G.,
Roventa E.,
Kröger R.,
Brendemühl B.,
Michler P.,
Gutowski J.,
Hommel D.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304126
Subject(s) - vertical cavity surface emitting laser , materials science , laser , lasing threshold , refractive index , distributed bragg reflector , optoelectronics , wavelength , optics , planar , distributed bragg reflector laser , physics , computer graphics (images) , computer science
The realization of a monolithic all II–VI‐based vertical cavity surface emitting laser (VCSEL) for the green spectral region is reported. Optically pumped lasing operation was achieved up to room temperature using a planar VCSEL structure. Taking advantage of distributed Bragg‐reflectors based on MgS/Zn(Cd)Se superlattices as the low‐refractive index material and ZnS 0.06 Se 0.94 layers as the high‐index material with a refractive index contrast of Δn = 0.6, a quality factor exceeding Q = 2000 is reached by using only 18 Bragg periods for the bottom DBR and 15 Bragg periods for the top DBR. The threshold power density is 0.32 MW/cm 2 at a temperature of 10 K (emission wavelength 498.5 nm) and 1.9 MW/cm 2 at room temperature (emission wavelength 502.3 nm). (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)