NDLI: Fabrication of low-threshold 1.3-μm InAs/InGaAs/GaAs quantum-dot lasers operating at room temperature

Content Provider	IEEE Xplore Digital Library
Author	Martiradonna, L. De Benedetto, E. Fortunato, L. Cingolani, R. De Vittorio, M. Salhi, A. Tasco, V. De Giorgi, M. Passaseo, A. Visimberga, G.
Copyright Year	2006
Description	Author affiliation: ISUFI, Lecce Univ. (Martiradonna, L.; De Benedetto, E.; Fortunato, L.; Cingolani, R.; De Vittorio, M.)
Abstract	We report on the growth, fabrication and characterization of low threshold laser diodes emitting around 1.3 mum. The quantum dot active region was optimised to get the highest photoluminescence emission and the lowest full width at half maximum (FWHM). Broad area laser diodes were processed from different samples containing three layers of InAs quantum dots (QDs), and cleaved at different cavity lengths (LC ). Electro-luminescence measurements were performed at room temperature under pulsed excitation. The laser diodes operate at room temperature and emit at 1.32 mum, in the low-absorption spectral window for telecom applications. The characteristic temperature T0 is in the range 60-77 K and the differential quantum efficiency is 53 %. For an infinite cavity length a threshold current density of 8 $A/cm^{2}$ per QD layer was obtained. Lasing from short-cavity diodes $(L_{C}$ = 750 mum) was also obtained after e-beam evaporation of high-reflection coatings on one edge of the in-plane laser structure
Starting Page	397
Ending Page	400
File Size	361924
Page Count	4
File Format	PDF
ISBN	1424401577
DOI	10.1109/RME.2006.1689979
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-12
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Quantum dot lasers Temperature Pulse measurements Optical device fabrication Gallium arsenide Photoluminescence Indium gallium arsenide Laser excitation Diode lasers
Content Type	Text
Resource Type	Article

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