Picosecond Dynamics of Photoexcitations in Amorphous Multilayer Structures

1986 ◽  
Vol 77 ◽  
Author(s):  
H. T. Grahn ◽  
Z. Vardeny ◽  
H. J. Maris ◽  
J. Tauc ◽  
B. Abeles
Keyword(s):  
Acoustic Waves ◽  
Carrier Transport ◽  
Multilayer Structures ◽  
Relaxation Processes ◽  
Repeat Distance ◽  
Ultrafast Relaxation ◽  
Interfacial Defects ◽  
Sublayer Thickness ◽  
Transmission And Reflection

ABSTRACTWe report on measurements of ultrafast relaxation processes in transmission and reflection in amorphous multilayer structures consisting of a-Si:H, a-SiNx:H, a-SiOx:H, and a-Ge:H. The decays recorded in transmission in the a-Si:H/a-SiNx:H and a-Si:H/a-SiOx:H multilayers depend strongly on the silicon sublayer thickness and are interpreted in terms of carrier transport to and trapping at interfacial defects. In the a-Si:H/a-Ge:H multilayers we observe oscillations in reflectivity due to standing acoustic waves with a frequency that depends on the repeat distance of the multilayer.

scholarly journals Ultrafast Relaxation Processes of Photosynthetic Carotenoids

2004 ◽  
Vol 32 (11) ◽  
pp. 701-710
Author(s):  
Hideki HASHIMOTO ◽  
Tokutake SASHIMA ◽  
Kazuhiro YANAGI ◽  
Masayuki YOSHIZAWA
Keyword(s):  
Relaxation Processes ◽  
Ultrafast Relaxation

scholarly journals Time-resolved luminescence spectroscopy by the optical Kerr-gate method applicable to ultrafast relaxation processes

2000 ◽  
Vol 62 (15) ◽  
pp. 10083-10087 ◽  
Author(s):  
J. Takeda ◽  
K. Nakajima ◽  
S. Kurita ◽  
S. Tomimoto ◽  
S. Saito ◽  
...  
Keyword(s):  
Luminescence Spectroscopy ◽  
Relaxation Processes ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
Optical Kerr Gate

scholarly journals Charge photo-carrier transport from silicon nanocrystals embedded in SiO2-based multilayer structures

2012 ◽  
Vol 112 (2) ◽  
pp. 024324 ◽  
Author(s):  
B. Dridi Rezgui ◽  
F. Gourbilleau ◽  
D. Maestre ◽  
O. Palais ◽  
A. Sibai ◽  
...  
Keyword(s):  
Silicon Nanocrystals ◽  
Carrier Transport ◽  
Multilayer Structures

scholarly journals Interaction acoustic waves with a layered structure containing layer of bubbly liquid

2018 ◽  
Vol 148 ◽  
pp. 15006
Author(s):  
Damir Gubaidullin ◽  
Anatolii Nikiforov
Keyword(s):  
Acoustic Waves ◽  
Theoretical Study ◽  
Bubbly Liquid ◽  
Air Bubbles ◽  
Angle Of Incidence ◽  
Natural Oscillations ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
Gel Layer ◽  
Transmission And Reflection

The results of a theoretical study of the effect of a bubble layer on the propagation of acoustic waves through a thin three-layered barrier at various angles of incidence are presented. The barrier consists of a layer of gel with polydisperse air bubbles bounded by layers of polycarbonate. It is shown that the presence of polydisperse air bubbles in the gel layer significantly changes the transmission and reflection of the acoustic signal when it interacts with such an obstacle for frequencies close to the resonant frequency of natural oscillations of the bubbles. The frequency range is identified where the angle of incidence has little effect on the reflection and transmission coefficients of acoustic waves.

Identification of Ultrafast Relaxation Processes As a Major Reason for Inefficient Exciton Diffusion in Perylene-Based Organic Semiconductors

2014 ◽  
Vol 136 (26) ◽  
pp. 9327-9337 ◽  
Author(s):  
Volker Settels ◽  
Alexander Schubert ◽  
Maxim Tafipolski ◽  
Wenlan Liu ◽  
Vera Stehr ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Relaxation Processes ◽  
Exciton Diffusion ◽  
Ultrafast Relaxation
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