Achieving far-field thermal rectification using gold-vanadium dioxide micro-gratings (Conference Presentation)

Romil Audhkhasi; Michelle Povinelli

doi:10.1117/12.2544421

10 March 2020 Achieving far-field thermal rectification using gold-vanadium dioxide micro-gratings (Conference Presentation)

Romil Audhkhasi, Michelle Povinelli

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Proceedings Volume 11289, Photonic and Phononic Properties of Engineered Nanostructures X; 112891D (2020) https://doi.org/10.1117/12.2544421
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

We propose gold micro-grating structures with VO2 filled slots as suitable emitters to achieve enhanced far-field thermal rectification. We numerically calculate the rectification ratio for two different approaches: peak extinction and peak shift. In the peak extinction approach, a change in temperature switches the coupling between a grating surface plasmon mode and far field on and off. In the peak shift approach it causes a shift in its resonant wavelength. In both these approaches, we discuss the effect of tuning the extinction coefficient of metallic and insulating VO2.

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Romil Audhkhasi and Michelle Povinelli "Achieving far-field thermal rectification using gold-vanadium dioxide micro-gratings (Conference Presentation)", Proc. SPIE 11289, Photonic and Phononic Properties of Engineered Nanostructures X, 112891D (10 March 2020); https://doi.org/10.1117/12.2544421

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KEYWORDS

Gold

Vanadium

Surface plasmons

Optical properties

Switches

Temperature metrology

Thermography

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