From amplified spontaneous emission to microring lasing using nanocrystal quantum dot solids
Abstract
We study different emission regimes in close-packed films of chemically synthesized CdSe nanoparticles [nanocrystal quantum dots (NQDs)]. We observe that the NQD photoluminescence is dominated by excitons and biexcitons, respectively, before and after the threshold for stimulated emission. Furthermore, we demonstrate the regime of microring lasing into sharp, whispering-gallery modes using NQD solids incorporated into microcapillary tubes. This result indicates a feasibility of miniature, solid-state laser devices based on chemically synthesized NQDs.
- Publication:
-
Applied Physics Letters
- Pub Date:
- August 2002
- DOI:
- 10.1063/1.1497708
- Bibcode:
- 2002ApPhL..81.1303M
- Keywords:
-
- cadmium compounds;
- II-VI semiconductors;
- nanostructured materials;
- superradiance;
- quantum well lasers;
- semiconductor quantum dots;
- stimulated emission;
- biexcitons;
- excitons;
- laser modes;
- ring lasers;
- photoluminescence;
- Cadmium Compounds;
- Cadmium Selenides;
- Excitons;
- Laser Modes;
- Nanostructure (Characteristics);
- Optical Properties;
- Packing Density;
- Photoluminescence;
- Quantum Dots;
- Quantum Well Lasers;
- Ring Lasers;
- Semiconductor Lasers;
- Semiconductors (Materials);
- Spontaneous Emission;
- Stimulated Emission;
- 42.55.Px;
- 78.67.Hc;
- 78.67.Bf;
- 78.45.+h;
- 78.55.Et;
- 42.60.Da;
- 71.35.Cc;
- Lasers and Masers;
- Semiconductor lasers;
- laser diodes;
- Quantum dots;
- Nanocrystals and nanoparticles;
- Stimulated emission;
- II-VI semiconductors;
- Resonators cavities amplifiers arrays and rings;
- Intrinsic properties of excitons;
- optical absorption spectra