Tadaaki Nagao
- Affiliation:
- International Center for Materials Nanoarchitechtonics (MANA)
- Specialty:
- Solid State Physics, Nano Spectroscopy, Nano Plasmonics
- Academic degree:
- Doctor of Science in Physics, Waseda University (1995)
- Home Page:
- See Personal Website
Research and Education History
- 1994
- Research Associate, Waseda University
- 1994-2001
- Research Associate, Department of Physics, University of Tokyo
- 2000-2003
- Researcher, Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency
- 2001-2004
- Associate Professor, Institute for Materials Research, Tohoku University
- 2004-2005
- Senior Researcher, ICYS, National Institute for Materials Science
- 2005-2006
- Senior Researcher, Subgroup leader, Nanomaterials Laboratory, National Institute for Materials Science
- 2006-2007
- Senior Researcher, Nanosystem Functionality Center, National Institute for Materials Science
- 2007-present
- International Center for Materials Nanoarchitechtonics
Research Interests
Phonons at surfaces and in thin films:
He studied the surface phonons of LaB6 (high brightness electron emitter), and clarified the mechanism of lattice relaxation of boron network for the first time for borides. He also studied phonons in epitaxial monolayers of alkali metal (low-work function material), which is one of the first studies that provided quantitative comparison between the ab initio theory and the experiment.
Atomic-scale low-dimensoinal plasmonics:
Confinement and propagation of plasmons in nanoscale objects becomes important for prospective application in modern electronics and photonics devices. Plasmons confined in atomic-scale low-D objects were detected by use of nano-spectroscopic technique with highly- collimated slow electron beam. Atomic-scale confinement effect in plasmon dispersion, dynamic exchange correlation, and in plasmon lifetime was clarified. He also runs fundamental and application study of plasmon-enhanced spectroscopy in infrared spectral region, by controlling the structure of nanometer-scale low-D metallic objects.
Spin-orbit splitting in nanomaterials:
He also studies Rashba-type spin-orbit coupling (SOC) effect in atomic-scale objects in various metallic nanostructures fabricated on silicon template surfaces. Correlation between the quantum-size effects, plasmonic properties, etc. is now under investigation.
Selected Papers
- T. Nagao, S. Yaginuma, T. Inaoka, and T. Sakurai, 'One-dimensional plasmon in atom wire array,' Physical Review Letters, 97, (2006) 116802.
- T. Hirahara, T. Nagao, I. Matsuda, G. Bihlmayer, E. Chulkov, Y. Koroteev, P. M. Echenique, M. Saito, S. Hasegawa, 'Role of Spin-orbit coupling and hybridization effects in the electronic structure of ultrathin Bi films,' Physical Review Letters, 97, (2006) 146803-1 - 4.
- T. Nagao, 'Effects of the change in dimensionality on plasmons in metallic nanomaterials,' OYO BUTURI, 73, 1312-1318(2004) (front cover article).
- T. Nagao, J.T. Sadowski, M. Saito, S. Yaginuma, T. Kogure, T. Ohno, Y. Fujikawa, S. Hasegawa, and T. Sakurai, 'Nanofilm Allotrope and Structural Transformation of Bi film on Si(111)-7x7,' Physical Review Letters, 93, (2004) 105501-1 -4.
- T. Nagao, T. Hildebrandt, M. Henzler, and S. Hasegawa, 'Dispersion and damping of a two-dimensional plasmon in a metallic surface-state band,' Physical Review Letters, 86, (2001) 5747-5750.