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| Research
Directors |
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Prof. Hiroyuki
Sakaki
Production Technology Institute,
The University of Tokyo |
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Prof. James
Merz
Nortre Dame University |
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| Prof. James Allen University
of California |
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Counterpart Organization: University of California
(U.S.A.)
Supporting National Agency: National Science Foundation
(NSF) |
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| It is known that when electrons are confined
into an ultra-thin membrane at about a 10-nm semiconductor,
electronic quantum waves clearly appear and form the constant-wave
state (a level), having specific frequencies perpendicular
to the membrane. By confining electrons into ultra-thin wires
or boxes and in quest for the way to better control the electrons,
we studied novel functions and material properties through
a cooperative research with the U.S.A. |
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| Aiming at developing a method for constituting
quantum wires and box structures as well as increasing the
controlling capability of quantum states, we made big advances
in the constitution of self-assembling quantum boxes, edge-shaped
wires, and stepped thin wires and also manifested the features
of low-dimensional electrons. Studying the responses to terahertz
radiation resonating between the levels with free electron
lasers of the UCSB, we discovered mixed lights of terahertz
and near-infrared in low level excitons and the dynamic Franz-Keldysh
effects. In addition, we achieved the wavelength conversion
between far and near infrared lights by a level transition. |
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