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Advanced Device Laboratory
Research Areas
We are exploring functional nanoelectronics that is complementary to the Silicon electronics. The single electron devices, quantum computing devices, spintronics devices and Teraherz(THz) devices are the subjects of our interests, where an electron spin, a nuclear spin and an exciton et al. may be controlled in a single particle level. To realize these devices in nanoscale dimensions, we not only use conventional semiconductor materials, but also use carbon nanotubes and semiconductor nanowires that have extremely small dimensions which is difficult to fabricate with conventional lithography technique. New physics or new functionalities that appear in the nanoscale devices are also our interests.

Research Subject
(1) Development of novel fabrication processes of nanostructures
(2) Fabrication of functional nanodevices and demonstration of their operation
(3) Exploring new functionalities in nanostructures and studying their physics
(4) Development of near-field THz imaging techniques
(5) Development of 3-dimensional surface analysis techniques with ion beams
 

Koji ISHIBASHI
Chief Scientist
Koji ISHIBASHI (D. Eng.)
mail

Results of research



List of Selected Publications
(1) Kawano, Y. and Ishibashi, K.:
"An on-chip near-field terahertz probe and detector."
Nature Photonics, 2, 618-621 (2008)
(2) Huang, SY., Fukata, N., Shimizu, M., Yamaguchi, T., Sekiguchi, T., and Ishibashi, K.:
"Classical Coulomb blockade of a silicon nanowire dot."
Appl. Phys. Lett., 92, 213110 (2008)
(3) Kawano, Y., Fuse, T., Toyokawa, S., Uchida, T., and Ishibashi, K.:
"Terahertz photon-assisted tunneling in carbon nanotube quantum dots."
J. Appl. Phys. 103, 034307 (2008)
(4) Fuse, T., Kawano, Y., Yamaguchi, T., Aoyagi, Y., and Ishibashi, K.:
"Quantum response of carbon nanotube quantum dots to terahertz wave irradiation."
Nanotechnology 18, 044001 (2007)
(5) Ishibashi, K., Moriyama, S., Tsuya, D., Fuse, T., and Suzuki, M.:
"Quantum-Dot Nanodevices with Carbon Nanotubes."
J. Vac. Sci. Technol. A24 (4), 1349-1355 (2006)
(6) Moriyama, S., Fuse, T., Aoyagi, Y., and Ishibashi, K.:
"Excitation spectroscopy of two-electron shell structures in carbon nanotube quantum dots in magnetic fields."
Appl. Phys. Lett. 87, 073103 (2005)
(7) Moriyama, S., Fuse, T., Suzuki, M., Aoyagi, Y., and Ishibashi, K.:
"Four-electron shell structures and an interacting two-electron system in carbon nanotube quantum dots."
Physical Review Letters. 94, 186806 (2005)
(8) Ishibashi, K., Tsuya, D., Suzuki, M., and Aoyagi, Y.:
"Fabrication of single electron inverter in multiwall carbon nanotubes."
Applied Physics Letters, 82, 3307 (2003).
(9) Suzuki, M., Ishibashi, K., Toratani, T., Tsuya, D., and Aoyagi, Y.:
"Tunnel barrier formation using Argon ion irradiation and single quantum dots in multi-wall carbon nanotubes."
Appl. Phys. Lett. 81, 2273 (2002)
(10) Ishibashi, K., Suzuki, M., Ida, T., and Aoyagi, Y.:
"Formation of coupled quantum dots in single-wall carbon nanotubes."
Applied Physics Letters, 79, 1864 (2001).


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