Cavity-enhanced photo-thermoelectric response in graphene under cyclotron resonance
We investigated the photo-thermoelectric response of Landau-quantized graphene in an infrared optical cavity structure. High-quality graphene/h-BN heterostructure was fabricated on a TiO2/Au optical cavity. We observed a large enhancement of the photo-thermoelectric voltage when the energy of the inter-Landau-level optical absorption, so-called cyclotron resonance, was coincident with that of the cavity mode. This is due to cavity-enhanced cyclotron resonance absorption of mid-infrared light. A maximum photovoltage responsivity of ∼107 V/W was obtained at a wavelength of 9.27 μm under a magnetic field as low as ∼1 Tesla. The obtained responsivity was significantly higher than that of conventional graphene devices. Our results provide an efficient photo-thermoelectric conversion scheme that utilizes Landau-quantized graphene and an optical cavity.
Authors
- Tomoki Machida (ORCID: https://orcid.org/0000-0002-1938-7415)
- Kenjiro Hayashi (ORCID: https://orcid.org/0000-0002-2287-0491)
- Momoko Onodera (ORCID: https://orcid.org/0000-0001-9457-6796)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Daiyu Kondo
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Naoki Fushimi (ORCID: https://orcid.org/0009-0002-0160-5231)
- Yijin Zhang (ORCID: https://orcid.org/0000-0003-1127-1124)
- Sabin Park (ORCID: https://orcid.org/0009-0005-5902-0633)
- Rai Moriya (ORCID: https://orcid.org/0000-0001-7471-7432)
- Shintaro Sato (ORCID: https://orcid.org/0000-0002-7249-5570)
Institutions
- National Institute for Materials Science (JP)
- Fujitsu (Japan) (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2024-08-26
- DOI
- https://doi.org/10.1063/5.0213435
- Citations
- 2
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Support Center for Advanced Telecommunications Technology Research Foundation
- Tokuyama Science Foundation
- Japan Society for the Promotion of Science
- Core Research for Evolutional Science and Technology
- Precursory Research for Embryonic Science and Technology
- JST-Mirai Program