High sensitivity bolometers based on metal nanoantenna dimers with a nanogap filled with vanadium dioxide
| Autor: | Hyeong-Ryeol Park, Dasom Kim, Young Chul Jun, Dong Kyun Kim, Kunook Chung, Seon Namgung, Hyuck Choo, Young-Geun Roh, Changhee Sohn, Dukhyung Lee, Dai-Sik Kim |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nanophotonics and plasmonics
Multidisciplinary Materials science business.industry Infrared Science Thermistor Bolometer Physics::Optics Article law.invention Wavelength Electrical resistance and conductance law Optical sensors Electric field Optoelectronics Medicine Nanorod Condensed Matter::Strongly Correlated Electrons business Plasmon Sub-wavelength optics |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-6 (2021) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | One critical factor for bolometer sensitivity is efficient electromagnetic heating of thermistor materials, which plasmonic nanogap structures can provide through the electric field enhancement. In this report, using finite element method simulation, electromagnetic heating of nanorod dimer antennas with a nanogap filled with vanadium dioxide (VO2) was studied for long-wavelength infrared detection. Because VO2 is a thermistor material, the electrical resistance between the two dimer ends depends on the dimer’s temperature. The simulation results show that, due to the high heating ability of the nanogap, the temperature rise is several times higher than expected from the areal coverage. This excellent performance is observed over various nanorod lengths and gap widths, ensuring wavelength tunability and ultrafast operating speed, thereby making the dimer structures a promising candidate for high sensitivity bolometers. |
| Databáze: | OpenAIRE |
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