Institute of Industrial Science

CPEC

Ee-202

Hirakawa Group ［Quantum nanophysics and its device

applications］

Center for Photonics Electronics Convergence

http://thz.iis.u-tokyo.ac.jp

Quantum Semiconductor Electronics Department of Electronic Engineering and Information Systems

- From atto to tera - Quantum nanophysics and its device applications

Quantum nanophysics and its device applications

Various intriguing physics shows up in quantum nanostructures owing to size quantization and electron-electron interaction effects. We investigate novel physics in such quantum nanostructures and explore their device applications.

■ Carrier dynamics and device applications of quantum nanostructures in the THz range ■ Physics and applications of single quantum dot transistors ■ Nanoscience for single molecular transistors ■ Molecular beam epitaxy of semiconductor quantum structures and nanofabrication

technologies Bloch oscillation in semiconductor superlattices and its application

to THz oscillators Fabrication of atomic-scale nanogap electrodes and single

molecular transistors

Physics and applications of single quantum dot transistors Crystal growth of quantum nanostructures by molecular beam epitaxy

-1 0 1 2 3 4Time (psec)

T = 10K

THz

elec

tric

field

, ETH

z (ar

b. u

nits

)

1

11

21

31

Fb = 39 kV/cm

GaAs (6.5 nm)/Al0.3Ga0.7As (2.5 nm) SL

femtosecond laser