Red, green, and blue laser action in solid colloidal quantum dot films
- Resource Type
- Conference
- Authors
- Dang, Cuong; Kwangdong Roh; Joonhee Lee; Breen, Craig; Steckel, Jonathan S.; Coe-Sullivan, Seth; Nurmikko, Arto
- Source
- 2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO) Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on. :1-2 Aug, 2012
- Subject
- Components, Circuits, Devices and Systems
Power, Energy and Industry Applications
Optical films
Optical pumping
Epitaxial growth
Stimulated emission
Radiative recombination
Quantum dot
Red green blue laser
Single exciton gain
Vertical cavity laser
- Language
- ISSN
- 1944-9399
We report on wavelength-variable lasing from optical gain media composed of colloidal quantum-dots (CQD) thin films across the visible spectrum. Exploiting single exciton gain enables amplified spontaneous emission (ASE) and vertical cavity lasing at very low optical pump thresholds. The average number of exciton per CQD at the ASE threshold is ∼ 0.8, which significantly reduces losses from enhanced nonradiative multiexciton Auger recombination in nanometer sized semiconductor particle, enabling quasi-continuous-wave CQD laser performance in densely packed nanocomposites.