Title :
Excited-state absorption of excitons and biexcitons confined in CuCl quantum dots
Author :
Miyajima, Kiyotomi ; Kagotani ; Edamatsu, Keiichi ; Itoh
Author_Institution :
Graduate Sch. of Eng. Sci., Osaka Univ., Japan
Abstract :
This study reports the first observation of the temporal evolution of the infrared transient absorption (IRTA) of CuCl quantum dots by means of tunable ultrafast pump-probe spectroscopy technique based on two optical parametric amplifiers (pulse width: 2 ps, repetition rate: 1 kHz). Results show that the IRTA originates not only from the excitons but also from the biexcitons confined in the quantum dots under high excitation intensities.
Keywords :
biexcitons; copper compounds; excited states; high-speed optical techniques; infrared spectra; optical parametric amplifiers; semiconductor quantum dots; 1 kHz; 2 ps; CuCl; CuCl quantum dots; confined biexcitons; confined excitons; excited-state absorption; infrared transient absorption; optical parametric amplifiers; tunable ultrafast pump-probe spectroscopy; Electromagnetic wave absorption; Excitons; Infrared spectra; Nonlinear optics; Optical pumping; Potential well; Pulse amplifiers; Quantum dots; Spectroscopy; Stimulated emission;
Conference_Titel :
Quantum Electronics Conference, 2003. EQEC '03. European
Print_ISBN :
0-7803-7733-8
DOI :
10.1109/EQEC.2003.1314044
