Open AccessHigher‐Order Transverse Modes in Possible Nitride VCSELs
Author(s) -
Nakwaski W.,
Maćkowiak P.,
Wasiak M.,
Sarzała R.P.,
Czyszanowski T.
Publication year - 2002
Publication title -
physica status solidi (c)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 46
eISSN - 1610-1642
pISSN - 1610-1634
DOI - 10.1002/pssc.200390095
Subject(s) - optoelectronics , materials science , multi mode optical fiber , nitride , laser , transverse plane , quantum well , optics , transverse mode , quantum , current (fluid) , physics , optical fiber , nanotechnology , layer (electronics) , engineering , structural engineering , thermodynamics , quantum mechanics
Excitation of various radiation modes during a possible room‐temperature continuous‐wave operation of nitride vertical‐cavity surface‐emitting lasers (VCSELs) is investigated and compared using the effective frequency optical model. Nitride VCSELs of a traditional design with two ring contacts have been found to exhibit unavoidable multimode operation which follows from an extremely non‐uniform current injection into their active regions. To enhance desired single‐fundamental‐mode operation, current injection into active regions should be at least uniform, which may be realized using e.g. a special design of nitride VCSELs with an additional semi‐transparent contact, two tunnel junctions and a double multiple‐quantum‐well active region.