Abstract
We demonstrate room temperature, continuous wave lasing of laser diodes based on AlGaAs whispering gallery mode (WGM) resonators (microcylinder and microring) embedding a quantum dot (QD) active layer. Using InGaAlAs QDs, high-Q (>60 000) lasing modes are observed around 910 nm, up to 50 degrees C. Lasing with similar performance is obtained around 1230 nm, using InAs QDs. Furthermore, we show that the current injection in the active part of the device is improved in ring resonators, leading to threshold currents of approximately 4 mA for a device with 80 mu m diameter. This geometry also suppresses WGMs with a high radial order, thus simplifying the lasing spectra. In these conditions, stable single-mode and two-color lasing can be obtained. (C) 2012 American Institute of Physics. [doi:10.1063/1.3678031]
Original language | English |
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Article number | 031111 |
Number of pages | 4 |
Journal | Applied Physics Letters |
Volume | 100 |
Issue number | 3 |
DOIs | |
Publication status | Published - 16 Jan 2012 |
Keywords
- WHISPERING-GALLERY MODES
- MICRODISK LASERS
- THRESHOLD CURRENT
- OPTICAL LOSS
- EMISSION
- MICROCAVITIES
- OPERATION
- SILICON
- DESIGN