NDLI: GaInP-(Al/sub y/Ga/sub 1-y/)InP 670 nm quantum-well lasers for high-temperature operation

Content Provider	IEEE Xplore Digital Library
Author	Smowton, P.M. Blood, P.
Copyright Year	1965
Abstract	We have examined the operation of 670 nm (Al/sub y/Ga/sub 1-y/)InP/GaInP quantum well lasers with different aluminium compositions (y=0.3, 0.4, and 0.5) in the barrier/waveguide layer so as to vary the optical confinement factor and hence the threshold gain requirement. Lasers with y=0.3 have the lowest threshold current over the range 200-400 K despite having the narrowest barrier band gap of the three structures. The measured intensity of spontaneous emission due to transitions in the well increases linearly with temperature between 280-400 K, whilst that from the barrier increases exponentially. An Arrhenius treatment of the emission from the barrier gives an activation energy of 198 meV/spl plusmn/25 meV which is in excellent agreement with the value predicted from the energy band diagram. When the experimental temperature dependence of the well and barrier contributions are removed from the measured threshold current, the remaining excess current has an activation energy of around 320 meV which is in excellent agreement with the value for thermally activated loss of electrons via the X conduction band minima. Since the X gap is insensitive to composition there is no increase in this leakage current when y is reduced so the overall effect is for the current to go down due to the reduced gain requirement per well.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	2159
Ending Page	2164
Page Count	6
File Size	984394
File Format	PDF
ISSN	00189197
Volume Number	31
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Quantum well lasers Waveguide lasers Optical waveguides Threshold current Indium phosphide Aluminum Stimulated emission Laser transitions Photonic band gap Spontaneous emission
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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