Title :
Ultrafast red-shift of biexciton binding energy by multiple exciton generation in PbS quantum dots
Author :
Younghwan Choi ; Seongchu Lim ; Young Hee Lee ; Hyunyong Choi
Author_Institution :
Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
Using ultrafast pump-probe spectroscopy, we investigate the exciton-exciton interaction in PbS quantum dot, and show that the biexciton binding energy is strongly altered by the extra single-exciton generated by the carrier multiplication process.
Keywords :
IV-VI semiconductors; biexcitons; high-speed optical techniques; lead compounds; red shift; semiconductor quantum dots; PbS; PbS quantum dots; biexciton binding energy; carrier multiplication process; exciton-exciton interaction; extra single-exciton; multiple exciton generation; ultrafast pump-probe spectroscopy; ultrafast red-shift; Educational institutions; Energy measurement; Excitons; Physics; Quantum dots; Semiconductor device measurement; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2013 Conference on
Conference_Location :
San Jose, CA
