Quantum Photo-Science Laboratory
Staff & Contact
| Educational Staff | Prof. Hiroyuki Katsuki Assistant Prof. Stemo Garrek |
|---|---|
| URL | https://qps-lab-naist-en.labby.jp/ |
Education and Research Activities in the Laboratory
The Quantum Photo-Science Laboratory studies various types of quantum states of target systems by using shaped ultrashort laser pulses and nonlinear spectroscopic techniques. While most properties of material are determined by the characteristics of constituent atoms and molecules, sometimes new and exotic optical and electromagnetic properties may appear in the coherent state, in which many atoms and molecules share a common phase factor. In our laboratory, we are interested in the quantum mechanical properties of materials, including the microcavity polaritons, coherent phonons, and two-dimensional semiconductor materials. We utilize lasers to investigate the ultrafast dynamics of such systems, looking for the applications such as polariton-based catalysis for chemical reactions, light emitting devices and photo-switching devices.Research Theme
1. Ultrafast dynamics of vibrational polaritons
Vibrational polariton is a mixed quasiparticle of Mid-IR photon and molecular vibrational motion. Recently, it is shown that the formation of vibrational polariton can affect various properties of molecules. We apply ultrafast spectroscopic techniques to reveal the background physics and chemistry of such new phenomena.2. Coherent control of condensed phase quantum states
Coherent control is a technique to manipulate the quantum wavefunction of target systems by precisely designed laser pulses. We apply this technique to control the coherent phonon motion in various single crystalline systems. Our goal is to trigger a photo-induced phase transition induced by electron-phonon interactions.3. two-dimensional semiconductor for nano-photonic devices
Transition metal dichalcogenide is a two-dimensional material with a finite bandgap. Depending on the number of layers, its optical properties change drastically. In particular, monolayer TMDC is promising for optoelectronic applications due to its high emissivity. We combine TMDC with our microcavity environment to develop room temperature quantum devices.Explanatory Pictures of Research Activities
Recent Research Papers and Achievements
- Development of spacer-less flow-cell cavity for vibrational polaritons, Hayata Yamada, Garrek Stemo, Hiroyuki Katsuki, and Hisao Yanagi, J. Phys. Chem. B 126, 4689-4696 (2022).
- Controlling ultrafast wave-packet spreading by Strong-Laser-Induced quantum interference, Hiroyuki Katsuki, Yukiyoshi Ohtsuki, Toru Ajiki, Haruka Goto, and Kenji Ohmori, Phys. Rev. Research 3, 043021 (2021).
- Polymorph- and molecular alignment-dependent lasing behaviors of a cyano-substituted thiophene/phenylene co-oligomer,Tomomi Jinjyo, Hitoshi Mizuno, Fumio Sasaki, and Hisao Yanagi, J. Mater. Chem. C 11, 1714-1725 (2023).
- Observation of Size-Dependent Optical Properties Based on Surface and Quantum Effects in Nanocrystals of 5,5′-Bis(4-Biphenylyl)-2,2′-Bithiophene, Tomomi Jinjyo, Hitoshi Mizuno, Kazuki Bando, Fumio Sasaki, Hisao Yanagi, Adv. Photonics Res. 3, 2100323 (2022).