Modulated optical transmission of subwavelength hole arrays in metal-VO2 films

Suh, Jae Yong; Donev, Eugenii U.; López, René; Feldman, L. C.; Haglund, Richard F.

doi:10.1063/1.2190463

Cited by 70 publications

(59 citation statements)

References 22 publications

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“…This possibility has been but sparsely explored, with only a few reports appearing regarding the effect of temperature on the plasmon resonance of Ag or Au nanospheres embedded in a VO 2 matrix [16][17][18], of composite Au-VO 2 films [19] or of VO 2 @Au (Auon-VO 2 ) core-shell particles [20]. Curiously, however, the possibility of self-regulating temperature control in these structures appears to have been hitherto overlooked.…”

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confidence: 99%

Core-shell nanoparticles with self-regulating plasmonic functionality

et al. 2007

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We propose a smart nanoparticle, a 'regulatron', that exploits a cycle of dynamic plasmonic feedback to self-regulate its temperature to a fixed range. One kind of regulatron can be conceived from VO 2 and Au; the temperature of this particle when illuminated by laser irradiation of suitable intensities and wavelengths is ~340K. We expect that regulatrons of this and other compositions will be useful in applications such as photothermal medical therapeutics.

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confidence: 99%

Core-shell nanoparticles with self-regulating plasmonic functionality

et al. 2007

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“…This might be partially ascribed to the relative difficulty in obtaining sub-wavelength metal patterns, especially in the visible range [6]. VO 2 is very commonly used for SP thermal tuning investigations [4,5,7], due to the large variation of refractive index (∼2.8 at room temperature and ∼2.2 at 80°C at 600 nm [8]) induced by the metal-insulator phase transition around 65°C. For preparation of large-area patterns with nano-scale resolution, physical (plasma) etching is usually used, which often requires a metallic sacrificial mask.…”

Section: Introductionmentioning

confidence: 98%

“…Alternative nanofabrication routes have to be used to generate the desired patterns. For example, Suh et al reported thermally modulated extraordinary transmission in Ag/VO 2 hole arrays prepared by focus ion beam etching [7].…”

Section: Introductionmentioning

confidence: 99%

Thermal tuning of surface plasmon resonance: Ag gratings on barium strontium titanate thin films

et al. 2011

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Surface plasmon tuning via thermally induced refractive index changes in ferroelectrics is investigated. Epitaxial (Ba 0.7 Sr 0.3 )TiO 3 (BST) thin films were deposited on MgO (001) substrates by pulsed laser deposition. The refractive index of BST thin films measured by the prism-coupling technique was found to increase from 2.3932 (TE)/1.9945 (TM) at room temperature to 2.3949 (TE)/1.9965 (TM) at 66°C. Then 30-nm-Ag gratings with periodicity 750 nm and width 300 nm were fabricated on BST by soft ultraviolet nanoimprint lithography and subsequent lift-off process. The reflection spectra from 500 to 1000 nm with incident angle from 5°to 60°were measured at room temperature and 66°C, with a collimated and p-polarized light incident perpendicularly to the grating direction. Several modes were observed from the spectra. At 66°C, a red shift of a dip at about 850 nm by 2 nm was obtained at an incident angle of 15°. Calculations confirmed that the observed modes belong to the (−1), (2), (−2) and (3) surface plasmon modes from the Ag and BST interfaces and localized mode; the red shift by thermal tuning is also confirmed. The results indicate the feasibility of active modulation in surface plasmon resonance in solid-state structures.

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“…In parallel with the advances in the generation of nanostructures with their interesting electronic [1], chemical [2][3][4], and optical properties [5][6][7][8], the possibility arose to investigate and use the matter-light interaction on the nanoscale. A very promising route to overcome the diffraction limit and to focus light on the nanometer scale is plasmonics on metallic nano-objects.…”

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confidence: 99%