The Official Site of Hideo Takeuchi, Ph. D.,

The real truth is I probably don't want to be too happy or content. Because ... then what? I actually like the quest, the search. That's the fun. The more lost you are, the more you have to look forward to. What do you know?　I’m having a great time, and I don't even know it. ー Ally McBeal, season 1, episode 1 "Pilot", (FOX TV, September 8, 1997).

News

#. February 20, 2025

Publication of the paper in Journal of Phyiscs Communications.

"Free induction decay processes of coherent folded longitudinal acoustic phonons in GaAs/AlAs finite size superlattices: control through the design of phonon dispersion curves"

#Link to the online-journal site (w/ open access option)
#. October 21, 2024

Publication of the paper in Journal of Applied Physics.

"Generation of a coherent longitudinal optical phonon plasmon coupled mode in an n-type InSb single crystal in the absence and/or strong suppression of the photo-Dember effect confirmed with the use of terahertz time-domain spectroscopy"

#Link to the online-journal site (w/ open access option)
#. August 29, 2024

Oral presentation at the academic conference, The 49th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2024), in September 1-6, The Univesity of Western Australia, Perth, WA, Australia.

Sesson "Ultrafast Phenomena", September 4, 2024

Terahertz waves, diluted GaAs nitride (GaAsN), coherent LO phonons, Decay time.

#Link to the academic conference site
#. September 17, 2023

Oral presentation at the academic conference, The 48th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2023), in September 2-7, Mount Royal Center, Montreal, Quebec, Canada.

Presentation Number & Date: We-PM2-2-2, September 20, 2023

Simple enhance method of terahertz waves, neodymium magnet GaAs, THz pulse, coherent LO phonon.

#Link to the academic conference site
#. June 24, 2023

Posterl presentation at the academic conference, The 17th International Conference on Phonon Scattering in Condensed Matter, Phonons 2023, in July 2-7, Conservatoire National des Arts et Métiers, France.

Keyword: Coherent longitudinal phonon, InAs, Effects of doping on generation mechnasims.

#Link to the academic conference site
#. May 14, 2023

Posterl presentation at the academic conference, The Condensed Matter and Quantum Materials 2023 (CMQM 2023) in June 28-30, University of Birmingham, Birmingham, United Kingdom..

Presentation Number & Date: to be announced

Keyword: Free induction decay, coherent folded longitudinal acoustic phonon, semiconductor superlattice, nanostructure.

#Link to the academic conference site
#. March 15, 2023

Publication of the paper in IEEE Transactions on Device and Materials Reliability.

"Nondestructive and quantitative evaluation of a GaAs epitaxial layer covered with a silicon nitride insulating thin film after a highly accelerated temperature and humidity stress with the use of photoreflectance spectroscopy"

#Link to the online-journal site (w/ open access option)
#. December 11, 2022

Oral presentation at the academic conference, AVS Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2022) in Dec. 11-15, Waikoloa Beach Marriott Resort & Spa, Big Island Hawaii, USA.

Presentation Number & Date: Presentation @TF-WeE-3, Dec. 14 18:20

Keyword: Optically excited dynamica phenomena in narrow gap semiconductors, photo-Dember effect, highly doping effect, Cohereten LO-phonon-electron-plasmon coupled mode and its generataion process, InSb, Teraherz time-domain spectroscopy (THz-TDS)

#Link to the academic conference site
#. October 15, 2022

Publication of the paper in Optics Continuum (formerly OSA Continuum)

"Decay time extension of terahertz electromagnetic waves emitted from coherent longitudinal optical phonons in GaAs epitaxial layers with the use of fast atom bombardment"

#Link to the online-journal site
#. June 27-30, 2022

Poster presentation at the academic conference, International Conference on Physics Semiconductors 2022 in Sydney, Australia.

"Topics: Terahertz wave from coherent LO phonons, Control of decay time, GaAs epilayers."

#Link to the conference site