RESEARCH
Laser-Matter Interaction Science
We study the interaction between ultra-intense lasers and materials.
We develop novel ultrahigh-intensity lasers, trying to find new physics in light-matter science.
Research Topics
Ultrahigh-intensity mid-infrared lasers
We are developing mid-infrared ultrafast pulse laser at a wavelength of 3 to 5 microns. Our purpose is to generate terawatt-class mid-infrared pulses using solid-state and fiber lasers and optical parametric amplification.
Reference
・A. V. Pushkin, et al.,
“Femtosecond graphene mode-locked Fe:ZnSe laser at 4.4 µm,”
Opt. Lett. 45, 738-741 (2020)
・T. Kanai et al., “Parametric amplification of 100 fs mid-infrared pulses in ZnGeP2 driven by a Ho:YAG chirped pulse amplifier,”
Opt. Lett. 42, 683-686 (2017).
・Development of mid-infrared high-power ultrashort pulse lasers
and its application to soft-matter micro-processing
Coherent X-ray generation
We are studying coherent X-ray generation using the interaction between ultra-intense lasers and solid surfaces.
Reference
・S. Tokita, et al.,
“Collimated fast electron emission from long wires
irradiated by intense femtosecond laser pulses,”
Phys. Rev. Lett. 106, 255001 (2011).
・T. Kanai et al., “Quantum interference during high-order harmonic generation from aligned molecules,” Nature 435, 470 (2005).
Double beta decay
We try to observe double beta decay in 48Ca, collaborating with Osaka University and University of Fukui. The enrichment of 48Ca isotopes using a high-power laser is expected to improve the sensitivity dramatically .
We are developing a high power laser with a narrow linewidth at a wavelength of 423 nm to enrich 48Ca isotopes.
Reference
・地下から解き明かす宇宙の歴史と物質の進化
・Study on Majorana nature of neutrinos by using 48Ca
and development of next generation detector system
・I. Ogawa, et al.,
“Development of the laser isotope separation method to study for
the neutrino-less double beta decay of 48Ca,”
J. Phys.: Conf. Ser. 2147, 012012 (2022).
The search for Dark Matter
We try to search for unknown particles such as axions using intense lasers, collaborating with Hiroshima University and other institutions.
We try to discover low-mass particles using photons by a novel method called
in-vacuum four-wave mixing.
Reference
・レーザー誘導共鳴散乱によるXENON1T超過事象のアクシオン的解釈の検証
・F. Ishibashi, et al., "Pilot Search for Axion-Like Particles by a Three-Beam Stimulated Resonant Photon Collider with Short Pulse Lasers," Universe 9, 123 (2023)
Femtosecond lasers for Industrial app.
In collaboration with private companies, we are developing compact, high-power femtosecond lasers for microfabrication.
Reference
・Now Preparing...