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InAs/GaAs quantum-dot laser diode lasing at 1.3 mu m with triple-stacked-layer dots-in-a-well structure grown by atomic layer epitaxy

Authors
Kim, Kwang WoongCho, Nam KiRyu, Sung PhilSong, Jin DongChoi, Won JunLee, Jung IlPark, Jung Ho
Issue Date
Oct-2006
Publisher
JAPAN SOC APPLIED PHYSICS
Keywords
InAs/GaAs quantum dot; laser diode; atomic layer epitaxy; simultaneous lasing
Citation
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.45, no.10A, pp.8010 - 8013
Indexed
SCIE
SCOPUS
Journal Title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
Volume
45
Number
10A
Start Page
8010
End Page
8013
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/125927
DOI
10.1143/JJAP.45.8010
ISSN
0021-4922
Abstract
We report the first demonstration of room-temperature (RT) lasing at 1.3 mu m from the ground state of three-stacked InAs quantum dots (QDs) in an In0.15Ga0.85As quantum well, which was grown by atomic layer epitaxy (ALE). For an as-cleaved device with a 2000-mu m-long x 15-mu m-wide ridge structure, the threshold current density (J(th)) at RT is 155 A/cm(2) with the ground state lasing at 1310nm under pulsed operation. The thermal coefficient of a lasing wavelength shift is 0.53 nm/K and the characteristic temperature is 103 K near RT. The lasing wavelength of the QD laser diodes (LDs) shows simultaneous lasing and the state switching from the ground state at 1310nm and to the first excited state at 1232nm kith increasing injection current owing to the gain saturation of the ground state. The performance of ALE QD-LD is comparable to that of the conventional Stranski-Krastanov QD-LD.
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