Effect of photo-irradiation on metal insulator transition in vanadium dioxide

Gi Yong Lee, Bongjin Simon Mun, Honglyoul Ju

Research output: Contribution to journalArticle

Abstract

We report a large transition temperature (TC) decrease in a VO2 thin film device under photo-irradiation. With the increasing photo-irradiation intensity (PIntensity) with a wavelength of 405 nm, the TC of the VO2 device decreased at a rate of ∼ 3.2 × 10 - 2 ° C W / cm 2 and reached as low as 40.0 °C at a PIntensity of 8.4 × 10 2 W / cm 2. While the change in TC is primarily due to the photothermal effect when the PIntensity is below 3.6 × 10 2 W / cm 2, both the photothermal and photo-induced carrier density effects contribute to the change in TC when the PIntensity is above 6.4 × 10 2 W / cm 2.

Original languageEnglish
Article number191902
JournalApplied Physics Letters
Volume113
Issue number19
DOIs
Publication statusPublished - 2018 Nov 5

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dioxides
vanadium
insulators
irradiation
metals
transition temperature
thin films
wavelengths

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Effect of photo-irradiation on metal insulator transition in vanadium dioxide",
abstract = "We report a large transition temperature (TC) decrease in a VO2 thin film device under photo-irradiation. With the increasing photo-irradiation intensity (PIntensity) with a wavelength of 405 nm, the TC of the VO2 device decreased at a rate of ∼ 3.2 × 10 - 2 ° C W / cm 2 and reached as low as 40.0 °C at a PIntensity of 8.4 × 10 2 W / cm 2. While the change in TC is primarily due to the photothermal effect when the PIntensity is below 3.6 × 10 2 W / cm 2, both the photothermal and photo-induced carrier density effects contribute to the change in TC when the PIntensity is above 6.4 × 10 2 W / cm 2.",
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Effect of photo-irradiation on metal insulator transition in vanadium dioxide. / Lee, Gi Yong; Mun, Bongjin Simon; Ju, Honglyoul.

In: Applied Physics Letters, Vol. 113, No. 19, 191902, 05.11.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of photo-irradiation on metal insulator transition in vanadium dioxide

AU - Lee, Gi Yong

AU - Mun, Bongjin Simon

AU - Ju, Honglyoul

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N2 - We report a large transition temperature (TC) decrease in a VO2 thin film device under photo-irradiation. With the increasing photo-irradiation intensity (PIntensity) with a wavelength of 405 nm, the TC of the VO2 device decreased at a rate of ∼ 3.2 × 10 - 2 ° C W / cm 2 and reached as low as 40.0 °C at a PIntensity of 8.4 × 10 2 W / cm 2. While the change in TC is primarily due to the photothermal effect when the PIntensity is below 3.6 × 10 2 W / cm 2, both the photothermal and photo-induced carrier density effects contribute to the change in TC when the PIntensity is above 6.4 × 10 2 W / cm 2.

AB - We report a large transition temperature (TC) decrease in a VO2 thin film device under photo-irradiation. With the increasing photo-irradiation intensity (PIntensity) with a wavelength of 405 nm, the TC of the VO2 device decreased at a rate of ∼ 3.2 × 10 - 2 ° C W / cm 2 and reached as low as 40.0 °C at a PIntensity of 8.4 × 10 2 W / cm 2. While the change in TC is primarily due to the photothermal effect when the PIntensity is below 3.6 × 10 2 W / cm 2, both the photothermal and photo-induced carrier density effects contribute to the change in TC when the PIntensity is above 6.4 × 10 2 W / cm 2.

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