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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
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Bolometric photodetection using plasmon-assisted resistivity change in vanadium dioxide
Hironobu Takeya1, James Frame2, Takuo Tanaka3,4,5,6
1Division of Advanced Electrical and Electronics Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei-shi, Tokyo, 184-8588, Japan.
Scientific Reports
|August 26, 2018
Summary
Vanadium dioxide thin films integrated with silver nanorods enhance bolometric photodetection. This novel thermo-plasmonic approach enables wavelength and polarization sensitivity in advanced microbolometers.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Vanadium oxide exhibits a significant temperature-dependent resistivity near room temperature, making it suitable for bolometric photodetection.
- Integrating nanomaterials can enhance the performance of existing sensing materials.
Purpose of the Study:
- To demonstrate photodetection using a stoichiometric vanadium dioxide thin film integrated with silver nanorods.
- To explore the thermo-plasmonic effect for enhanced bolometric photodetection capabilities.
Main Methods:
- Fabrication of a vanadium dioxide thin film.
- Integration of silver nanorods onto the vanadium dioxide film.
- Utilizing localized surface plasmon resonance for light-to-heat conversion.
- Investigating the effect of light on the resistivity of the composite material.
Main Results:
- Silver nanorods effectively convert light into heat through localized surface plasmon resonance.
- This generated heat suppressed the resistivity of the vanadium dioxide.
- The integrated system demonstrated wavelength and polarization sensitivity in photodetection.
Conclusions:
- The thermo-plasmonic effect in vanadium dioxide-silver nanorod systems significantly enhances bolometric photodetection.
- This approach paves the way for developing novel photodetection functionalities in vanadium dioxide-based microbolometers.
- The study highlights the potential of hybrid plasmonic-thermoelectric materials for advanced optical sensing.
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