Ultrafast carrier trapping in microcrystalline silicon observed in optical pump–terahertz probe measurements

2001 ◽  
Vol 79 (9) ◽  
pp. 1291-1293 ◽  
Author(s):  
P. Uhd Jepsen ◽  
W. Schairer ◽  
I. H. Libon ◽  
U. Lemmer ◽  
N. E. Hecker ◽  
...  
Keyword(s):  
Microcrystalline Silicon ◽  
Optical Pump ◽  
Carrier Trapping ◽  
Ultrafast Carrier ◽  
Probe Measurements

Pump-Probe Measurements Using Silicon Nanocrystal Waveguides

2003 ◽  
Vol 770 ◽  
Author(s):  
Nathanael Smith ◽  
Max J. Lederer ◽  
Marek Samoc ◽  
Barry Luther-Davies ◽  
Robert G. Elliman
Keyword(s):  
Probe Beam ◽  
Time Resolution ◽  
Pump Beam ◽  
Silicon Nanocrystals ◽  
Continuous Wave ◽  
Optical Gain ◽  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Measurements

AbstractOptical pump-probe measurements were performed on planar slab waveguides containing silicon nanocrystals in an attempt to measure optical gain from photo-excited silicon nanocrystals. Two experiments were performed, one with a continuous-wave probe beam and a pulsed pump beam, giving a time resolution of approximately 25 ns, and the other with a pulsed pump and probe beam, giving a time resolution of approximately 10 ps. In both cases the intensity of the probe beam was found to be attenuated by the pump beam, with the attenuation increasing monotonically with increasing pump power. Time-resolved measurements using the first experimental arrangement showed that the probe signal recovered its initial intensity on a time scale of 45-70 μs, a value comparable to the exciton lifetime in Si nanocrystals. These data are shown to be consistent with an induced absorption process such as confined carrier absorption. No evidence for optical gain was observed.

Ultrafast carrier trapping in high energy ion implanted gallium arsenide

1996 ◽  
Vol 68 (16) ◽  
pp. 2225-2227 ◽  
Author(s):  
C. Jagadish ◽  
H. H. Tan ◽  
A. Krotkus ◽  
S. Marcinkevicius ◽  
K. P. Korona ◽  
...  
Keyword(s):  
Gallium Arsenide ◽  
High Energy ◽  
Carrier Trapping ◽  
Ultrafast Carrier ◽  
Ion Implanted

Ultrafast carrier trapping in oxygen-doped metal-organic vapor phase epitaxy GaAs

1997 ◽  
Vol 70 (12) ◽  
pp. 1560-1562 ◽  
Author(s):  
J. U. Kang ◽  
M. Y. Frankel ◽  
J.-W. Huang ◽  
T. F. Kuech
Keyword(s):  
Vapor Phase ◽  
Vapor Phase Epitaxy ◽  
Carrier Trapping ◽  
Organic Vapor ◽  
Ultrafast Carrier ◽  
Metal Organic

Photoexcited d -electron dynamics in transition metal oxide MnO studied by optical pump-THz probe measurements

2015 ◽  
Vol 13 (2-3) ◽  
pp. 113-116
Author(s):  
Junichi Nishitani ◽  
Takayuki Kurihara ◽  
Akifumi Asahara ◽  
Takeshi Nagashima ◽  
Mikk Lippmaa ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Transition Metal Oxide ◽  
Electron Dynamics ◽  
Optical Pump ◽  
Probe Measurements
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