221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film
Photothermal heaters are important devices for optical switches and memories based on the thermo-optic/magneto-optic effect and phase change materials. We demonstrated photothermal heating in Si plasmonic waveguides loaded with Co thin films by measuring the resistance change upon inputting transver...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/19/6634 |
| _version_ | 1797515701163917312 |
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| author | Nana Ota Tomohiro Miyauchi Hiromasa Shimizu |
| author_facet | Nana Ota Tomohiro Miyauchi Hiromasa Shimizu |
| author_sort | Nana Ota |
| collection | DOAJ |
| description | Photothermal heaters are important devices for optical switches and memories based on the thermo-optic/magneto-optic effect and phase change materials. We demonstrated photothermal heating in Si plasmonic waveguides loaded with Co thin films by measuring the resistance change upon inputting transverse-magnetic (TM) mode light. Temperature rise is proportional to the light intensity with clear polarization dependence. The photothermal conversion efficiency was estimated at 36 K/mW and maximum temperature rise was estimated at 221 K at steady state upon the inputting 6.3 mW TM mode light for the 400 nm-wide, 8 µm-long and 189 nm-thick Co film deposited on the Si wire waveguide with 129 nm-thick SiO<sub>2</sub> buffer layer. The method to increase the efficiency is discussed based on the experimental and simulation results considering the thickness of the SiO<sub>2</sub> buffer layer, Co layer and Si core layer, waveguide width, and wavelength. Local photothermal heaters in this study can be applied to a variety of fields including optical switches/memories without electrical control signals in photonic integrated circuits, on-chip optical sensors, and a lab-on-a-chip in biology, chemistry, and medicine. |
| first_indexed | 2024-03-10T06:50:59Z |
| format | Article |
| id | doaj.art-435418ffcd204834b6dfd8dcb5a142a6 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T06:50:59Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-435418ffcd204834b6dfd8dcb5a142a62023-11-22T16:49:05ZengMDPI AGSensors1424-82202021-10-012119663410.3390/s21196634221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin FilmNana Ota0Tomohiro Miyauchi1Hiromasa Shimizu2Department of Electrical and Electronic Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, JapanDepartment of Industrial Technology and Innovation, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, JapanDepartment of Electrical and Electronic Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, JapanPhotothermal heaters are important devices for optical switches and memories based on the thermo-optic/magneto-optic effect and phase change materials. We demonstrated photothermal heating in Si plasmonic waveguides loaded with Co thin films by measuring the resistance change upon inputting transverse-magnetic (TM) mode light. Temperature rise is proportional to the light intensity with clear polarization dependence. The photothermal conversion efficiency was estimated at 36 K/mW and maximum temperature rise was estimated at 221 K at steady state upon the inputting 6.3 mW TM mode light for the 400 nm-wide, 8 µm-long and 189 nm-thick Co film deposited on the Si wire waveguide with 129 nm-thick SiO<sub>2</sub> buffer layer. The method to increase the efficiency is discussed based on the experimental and simulation results considering the thickness of the SiO<sub>2</sub> buffer layer, Co layer and Si core layer, waveguide width, and wavelength. Local photothermal heaters in this study can be applied to a variety of fields including optical switches/memories without electrical control signals in photonic integrated circuits, on-chip optical sensors, and a lab-on-a-chip in biology, chemistry, and medicine.https://www.mdpi.com/1424-8220/21/19/6634optical waveguideplasmonic waveguidelocal heatingphotonic integrated circuitoptical sensorssurface plasmon polariton |
| spellingShingle | Nana Ota Tomohiro Miyauchi Hiromasa Shimizu 221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film Sensors optical waveguide plasmonic waveguide local heating photonic integrated circuit optical sensors surface plasmon polariton |
| title | 221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film |
| title_full | 221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film |
| title_fullStr | 221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film |
| title_full_unstemmed | 221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film |
| title_short | 221 K Local Photothermal Heating in a Si Plasmonic Waveguide Loaded with a Co Thin Film |
| title_sort | 221 k local photothermal heating in a si plasmonic waveguide loaded with a co thin film |
| topic | optical waveguide plasmonic waveguide local heating photonic integrated circuit optical sensors surface plasmon polariton |
| url | https://www.mdpi.com/1424-8220/21/19/6634 |
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