Physics – Optics
Scientific paper
2005-11-17
Optics Express, Vol. 14, No. 3, pp. 1094-1105, Feb. 6, 2006 (http://www.opticsexpress.org/abstract.cfm?id=87777)
Physics
Optics
6 figures
Scientific paper
10.1364/OE.14.001094
The quality factor (Q), mode volume (Veff), and room-temperature lasing threshold of microdisk cavities with embedded quantum dots (QDs) are investigated. Finite element method simulations of standing wave modes within the microdisk reveal that Veff can be as small as 2(lambda/n)^3 while maintaining radiation-limited Qs in excess of 10^5. Microdisks of diameter D=2 microns are fabricated in an AlGaAs material containing a single layer of InAs QDs with peak emission at lambda = 1317 nm. For devices with Veff ~2 (lambda/n)^3, Qs as high as 1.2 x 10^5 are measured passively in the 1.4 micron band, using an optical fiber taper waveguide. Optical pumping yields laser emission in the 1.3 micron band, with room temperature, continuous-wave thresholds as low as 1 microWatt of absorbed pump power. Out-coupling of the laser emission is also shown to be significantly enhanced through the use of optical fiber tapers, with laser differential efficiency as high as xi~16% and out-coupling efficiency in excess of 28%.
Borselli Matthew
Krishna Sanjay
Painter Oskar
Srinivasan Kartik
Stintz Andreas
No associations
LandOfFree
Cavity Q, mode volume, and lasing threshold in small diameter AlGaAs microdisks with embedded quantum dots does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cavity Q, mode volume, and lasing threshold in small diameter AlGaAs microdisks with embedded quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cavity Q, mode volume, and lasing threshold in small diameter AlGaAs microdisks with embedded quantum dots will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-588428