Kim, Kwang Woong Cho, Nam Ki Ryu, Sung Phil Song, Jin Dong Choi, Won Jun Lee, Jung Il Park, Jung Ho 2024-01-21T02:06:38Z 2024-01-21T02:06:38Z 2021-09-01 2006-10 0021-4922 https://pubs.kist.re.kr/handle/201004/135084 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. English JAPAN SOC APPLIED PHYSICS ROOM-TEMPERATURE THRESHOLD CURRENT SPACER LAYER DEPENDENCE 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 Article 10.1143/JJAP.45.8010 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.45, no.10A, pp.8010 - 8013 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 45 10A 8010 8013 scie scopus 000241508600086 2-s2.0-34250013320 Physics, Applied Physics Article ROOM-TEMPERATURE THRESHOLD CURRENT SPACER LAYER DEPENDENCE InAs/GaAs quantum dot laser diode atomic layer epitaxy simultaneous lasing