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Quantum dots (QDs) are interesting material options for the lighting and display markets, however, several limitations have limited QD applicability. This tutorial will review both limitations and breakthroughs in QD performance that has led to their recent commercialization in both of these markets.Show More
Low threshold lasers from wavelength-engineered colbidal quantum dot enabled by single-exciton optical gain
Cuong Dang;Kwangdong Roh;Joonhee Lee;Arto Nurmikko;Craig Breen;Jonathan S. Steckel;Seth Coe-Sullivan
2012 Lester Eastman Conference on High Performance Devices (LEC)
Year: 2012 | Conference Paper |
Wavelength engineered nanocrystal colloidal quantum dots were used to create a thin solid films. Very low thresholds for light amplification were achieved in these red, green and blue film by a single exciton gain mechanism which also enables optical gain with quasi-steady pumping source.Show More
Red, green, and blue laser action in solid colloidal quantum dot films
Cuong Dang;Kwangdong Roh;Joonhee Lee;Craig Breen;Jonathan S. Steckel;Seth Coe-Sullivan;Arto Nurmikko
2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO)
Year: 2012 | Conference Paper |
Cited by: Papers (1)
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 e...Show More
Wavelength engineered luminescent material incorporating colloidal quantum dot within a nanoporous gallium nitride matrix
Cuong Dang;Yu Zhang;Joonhee Lee;Jung Han;Arto Nurmikko;Craig Breen;Jonathan S. Steckel;Seth Coe-Sullivan
CLEO: 2011 - Laser Science to Photonic Applications
Year: 2011 | Conference Paper |
Cited by: Patents (1)
A new nanocomposite material was created by embedding colloidal CdSe-based quantum dots (QDs) within single crystal nanoporous gallium nitride (GaN) host. High efficiency luminescence and wavelength-engineered ability of colloidal QDs combined with high performance of nitride blue LEDs suggest this nanomaterial's potential for solid state lighting.Show More
Optical gain and green/red vertical cavity surface emitting lasing from cdse-based colloidal nanocrystal quantum dot thin films
Cuong Dang;Arto Nurmikko;Craig Breen;Jonathan S. Steckel;Seth Coe-Sullivan
CLEO: 2011 - Laser Science to Photonic Applications
Year: 2011 | Conference Paper |
We demonstrate robust excitonic gain from colloidal close-packed, CdSe-based nanocrystal quantum dot thin films at record low threshold excitation energy of 90 μJ/cm2 for amplified spontaneous emission. The optical gain is employed in pulsed optically pumped quantum dot vertical cavity surface emitting lasers in the green and the red, respectively.Show More
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