1. Band Gap and Diameter Modulation of Quantum Dots in Glasses.
- Author
-
Liu, Chao and Heo, Jong
- Subjects
- *
PHOTONIC band gap structures , *BAND gaps , *DIAMETER , *QUANTUM dots , *GLASS , *ABSORPTION , *PHOTOLUMINESCENCE - Abstract
Modulation of the band gap energy and diameter of quantum dots (QDs) formed in glasses is important to achieve the optimized performance for applications as infrared light sources, lasers, saturable absorbers, etc. Absorption and photoluminescence of PbS QDs were extended into mid-infrared wavelength range in glasses containing small amount of lead but oversaturated with sulfur. Dual-band photoluminescence of PbSe QDs was prepared in oxyfluoride glass-ceramics containing BaF2 nanocrystals. By introducing SnO in the glasses, alloyed Pb1-xSnxSe QDs with smaller band gap energies were formed in glasses, and mid-infrared photoluminescence of Pb1-xSnxSe QDs at ~2570 nm in wavelength was achieved. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF