Active media based on submonolayer (SML) quantum-dots are a novel gain material that potentially combines the high gain of semiconductor quantum-wells with the ultrafast gain recovery of Stranski-Krastanov quantumdots. By comparison of theory and experiment, we find an ultrafast gain recovery timescale well below one picosecond, along with a high optical gain. We investigate SML lasers theoretically and provide comparisons with conventional quantum-dot devices. We find a substantial increase in small-signal bandwidth and largesignal modulation capability. Our results show that semiconductor submonolayer laser and amplifier devices are promising candidates for high-speed optoelectronics as well as integrated photonics applications.

Date Published: 22 February 2017
PDF: 7 pages
Proc. SPIE 10098, Physics and Simulation of Optoelectronic Devices XXV, 1009816 (22 February 2017); doi: 10.1117/12.2252754

Published in SPIE Proceedings Vol. 10098:
Physics and Simulation of Optoelectronic Devices XXV
Bernd Witzigmann; Marek Osiński; Yasuhiko Arakawa, Editor(s)