Laser-Combined Scanning Tunneling Microscopy on the Carrier Dynamics in Low-Temperature-Grown GaAsAlGaAsGaAs
Joint Authors
Shigekawa, Hidemi
Takeuchi, Osamu
Yoshida, Shoji
Terada, Yasuhiko
Source
Advances in Optical Technologies
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-11-22
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
We investigated carrier recombination dynamics in a low-temperature-grown GaAs (LT-GaAs)/AlGaAs/GaAs heterostructure by laser-combined scanning tunneling microscopy, shaken-pulse-pair-excited STM (SPPX-STM).
With the AlGaAs interlayer as a barrier against the flow of photocarriers, recombination lifetimes in LT-GaAs of 4.0 ps and GaAs of 4.8 ns were successfully observed separately.
We directly demonstrated the high temporal resolution of SPPX-STM by showing the recombination lifetime of carriers in LT-GaAs (4.0 ps) in the range of subpicosecond temporal resolution.
In the carrier-lifetime-mapping measurement, a blurring of recombination lifetime up to 50 nm was observed at the LT-GaAs/AlGaAs boundary, which was discussed in consideration of the screening length of the electric field from the STM probe.
The effect of the built-in potential on the signal, caused by the existence of LT-GaAs/AlGaAs/GaAs boundaries, was discussed in detail.
American Psychological Association (APA)
Terada, Yasuhiko& Yoshida, Shoji& Takeuchi, Osamu& Shigekawa, Hidemi. 2011. Laser-Combined Scanning Tunneling Microscopy on the Carrier Dynamics in Low-Temperature-Grown GaAsAlGaAsGaAs. Advances in Optical Technologies،Vol. 2011, no. 2011, pp.1-9.
https://search.emarefa.net/detail/BIM-477373
Modern Language Association (MLA)
Terada, Yasuhiko…[et al.]. Laser-Combined Scanning Tunneling Microscopy on the Carrier Dynamics in Low-Temperature-Grown GaAsAlGaAsGaAs. Advances in Optical Technologies No. 2011 (2011), pp.1-9.
https://search.emarefa.net/detail/BIM-477373
American Medical Association (AMA)
Terada, Yasuhiko& Yoshida, Shoji& Takeuchi, Osamu& Shigekawa, Hidemi. Laser-Combined Scanning Tunneling Microscopy on the Carrier Dynamics in Low-Temperature-Grown GaAsAlGaAsGaAs. Advances in Optical Technologies. 2011. Vol. 2011, no. 2011, pp.1-9.
https://search.emarefa.net/detail/BIM-477373
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-477373
