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 4 Time (psec) T = 10K THz electric field, E THz (arb. units) 1 11 21 31 F b = 39 kV/cm GaAs (6.5 nm)/Al 0.3 Ga 0.7 As (2.5 nm) SL femtosecond laser