Nanophotonics Group
STAFF
IWANAGA, Masanobu; FUDOUZI, Hiroshi; HO, Ya-Lun（Staff Tabs）
AIM and GOAL
Our research targets are nanophotonics materials such as metasurfaces (metamaterials) and photonic crystals, composed of subwavelength-sized structures. We will create artificial materials with peculiar optical functions never attained in nature by precise design and high-accuracy fabrication. In addition to the applications of nanophotonics materials to sensors, etc., we will also focus on fundamental researches for exploring novel physics.
APPROACH
Our highly engineered nanophotonics materials are produced by both approaches: the top-down nanofabrication and the bottom-up self-assembly. We are developing metasurfaces with precise surface structures suf ficiently smaller than the optical wavelength and applying them to biosensors and infrared detectors.
We are developing three-dimensional self-assembling techniques of spherical colloidal particles and colloidal quantum dots, and e xtending their application to strain imaging and lasers.
FIG 1 Metasurface biosensor to detect a target DNA at ultrahigh sensitivity (top). Metasurface infrared dual-wavelength detector for measuring the concentration of a specific gas (bottom).
FIG 2 Roll-to-Roll continuous growth of colloidal photonic crystals (left). High-quality thin film made of perovskite quantum dots (right).
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FUDOUZI, Hiroshi
Email: FUDOUZI.Hiroshi@nims.go.jp
FUDOUZI, Hiroshi's SAMURAI page
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IWANAGA, Masanobu：Group Leader
Email: IWANAGA.Masanobu@nims.go.jp
IWANAGA, Masanobu's SAMURAI page
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HO, Ya-Lun
Outline：Low-dimensional materials have emerged as promising candidates for applications in nanophotonics and optoelectronics due to their unique optical properties and atomic scale. A major issue in developing practical low-dimensional materials-based nanophotonic devices is realizing photonic structures via on-chip fabrication with low-dimensional materials, enabling strong light-matter interaction within atomic scale. In my research, I design and develop nanophotonic, plasmonic, and metasurface platforms, as well as original nanofabrication techniques, specifically tailored for low-dimensional materials.
Features：
- High-quality low-dimensional material-based nanophotonic structures for on-chip integrated devices
- Large-area and non-transfer top-down nanofabrication technologies tailored to colloidal quantum dots and 2D materials
- Compatibility with well-established semiconductor fabrication processes
- Nanophotonics and metasurface design enabling efficient coupling of light into the atomic scale, ensuring strong light-matter interaction and high quality factor
Feasible study: Here, the works based on perovskite QDs, including on-chip integrated single-mode lasers, nanolaser-waveguide coupled photonic circuits, metasurface-based surface-emitting lasers, and plasmonic hot-electron photodetection devices, have been developed and presented by utilizing superior quantum efficiency and recrystallization properties of perovskite QDs.
Summary：My research positioning is to bring the potentials of low-dimensional materials into real integrated nanophotonics by coupling these advanced photonic materials, new-design nanophotonic platforms, and original on-chip nanofabrication, and further to push the limits of nanophotonics via low-dimensional materials.
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