TY - JOUR
T1 - Nonlinear optical spectra of the confined excitons in stress induced nanostructures in bii3
AU - Akai, Ichiro
AU - Karasawa, Tsutomu
AU - Komatsu, Teruo
AU - Iwai, Sadayuki
AU - Edamatsu, Keiichi
AU - Itoh, Tadashi
AU - Yano, Satoshi
AU - Goto, Takenori
PY - 1995/1
Y1 - 1995/1
N2 - We report the optical nonlinear response of the confined excitons in nanostructures induced by external stress in a layered crystal BiI3. The absorption intensity of the confined excitons is saturated by intense laser excitation. We clarify the size dependence of the saturation density which reflects the nanostructure size. The saturation density of the confined exciton in large domains is lower than the the case of small domains. By pump-probe measurements using a sub-picosecond laser pulse, we examine the dynamical process of the confined excitons in the disks with various sizes. From the temporal behavior of the absorption saturation, it becomes clear that the exciton life times in small disks are shorter than the large ones. A new nonlinearly growing luminescence due to the process by a inelastic recoiling of excitons is detected.
AB - We report the optical nonlinear response of the confined excitons in nanostructures induced by external stress in a layered crystal BiI3. The absorption intensity of the confined excitons is saturated by intense laser excitation. We clarify the size dependence of the saturation density which reflects the nanostructure size. The saturation density of the confined exciton in large domains is lower than the the case of small domains. By pump-probe measurements using a sub-picosecond laser pulse, we examine the dynamical process of the confined excitons in the disks with various sizes. From the temporal behavior of the absorption saturation, it becomes clear that the exciton life times in small disks are shorter than the large ones. A new nonlinearly growing luminescence due to the process by a inelastic recoiling of excitons is detected.
KW - Absorption saturation
KW - Confined exciton
KW - Inelastic recoiling of exciton
KW - Nanostructure
KW - Nonlinear luminescence
KW - Optical nonlinearity
KW - Quantum disk
KW - Ultrafast phenomena
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U2 - 10.7567/JJAPS.34S1.113
DO - 10.7567/JJAPS.34S1.113
M3 - Article
AN - SCOPUS:30244481553
VL - 34
SP - 113
EP - 115
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - S1
ER -