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Masashi Yamaguchi
Associate Professor of Physics
Contact:
(518) 276-3092
yamagm@rpi.edu
Home Page: http://www.rpi.edu/~yamagm/
Education:
Ph.D. (Hokkaido University)
Career Highlights:
Yamaguchi’s accomplishments include the fundamental understanding of structural evolution in partially ordered crystals, glasses, and supercooled liquids using time-domain and frequency domain spectroscopy.
Specific examples are discovery of a new acoustic anomaly in the phase transition of quantum parelectric crystals (the dielectic constant increases when the temperature decreases); measurements of elastic stiffness of MOCVD (Metal Organic Chemical Vapor Deposition) grown lattice mismatched nitride semiconductors; manipulation of acoustic phonons using impulsive stimulated Brillouin light scattering; polariton based THz spectroscopy for study of large-scale fluctuations of ferroelectric nanodomains; and the THz acoustic spectroscopy for the study of elastic modulus constant of amorphous thin films.
Research Interests:
Structural and electronic dynamics in condensed matter, THz spectroscopy of advanced materials, THz science and technology.
Selected Publications:
1. C. Klieber, E. Peronne, K. Katayama, J. Choi, M. Yamaguchi, T. Pezeril, K. A. Nelson, “Narrow-band acoustic attenuation measurements in vitreous silica at frequencies between 20 and 400 GHz”, Appl. Phys. Lett., 98, 211908 (2011).
2. J. Das and M. Yamaguchi, “Tunable narrow band THz wave generation from laser induced gas plasma”, Opt. Express, 18, 7038 (2010).
3. M. Yamaguchi, J. Liu, D. Ye, and T. Lu, “Acoustic Vibrations in Silicon Submicron Spiral Arrays”, J. App. Phys., 106, 033517(2009).
4. M. Yamaguchi and J. Das “Terahertz Wave Generation in Nitrogen Gas Using Shaped Optical Pulses”, J. Opt. Soc. Am. B, 26, A90 (2009).
5. K. Johnson, M. Price-Gallagher, O. Mamer, A. Lesimple, C. Fletcher, Y. Chen, X. Lu, M. Yamaguchi, and X. -C. Zhang,”Water Vapor: An Extraordinary Terahertz Wave Source under Optical Excitation”, Phys. Lett. A, 372, 6037 (2008).
6. N. Karpowicz, J. Dai, X. Lu, Y. Chen, M. Yamaguchi, H. Zhao, X. -C. Zhang, L. Zhang, C. Zhang, M.Price-Gallagher, C. Fletcher, O. Mamer, A. Lesimple, K. Johnson, ”Coherent heterodyne time-domain spectroscopy covering the entire “terahertz gap”, Appl. Phys. Lett., 92, 011131(2008).
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