A Photonic Switch Based on a Hybrid Combination of Metallic Nanoholes and Phase-change Vanadium Dioxide

Sun, Miao; Taha, Mohammad; Walia, Sumeet; Bhaskaran, Madhu; Sriram, Sharath; Shieh, William; Unnithan, Ranjith Rajasekharan

doi:10.1038/s41598-018-29476-6

Cited by 40 publications

(25 citation statements)

References 55 publications

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“…The phase-transition and phase-change materials have enabled a wide variety of metasurface devices [151]. VO 2 has been applied to the frequency control of plasmonic antenna arrays [152][153][154][155], free-space phase [156,157], amplitude [158][159][160][161][162] and polarization [163] modulators, plasmonic color generation [164,165], adaptive thermal camouflage [166], tunable absorbers and emitters [167][168][169][170][171], and free-form metadevices [134]. Compared to VO 2 , chalcogenide O-PCMs exemplified by GST offer even larger optical contrast in the near-IR and UV spectral regimes with an index change up to 2.8 [172][173][174][175][176].…”

Section: Optical Phase-change Mediamentioning

confidence: 99%

Design for quality: reconfigurable flat optics based on active metasurfaces

et al. 2020

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Optical metasurfaces, planar subwavelength nanoantenna arrays with the singular ability to sculpt wavefront in almost arbitrary manners, are poised to become a powerful tool enabling compact and high-performance optics with novel functionalities. A particularly intriguing research direction within this field is active metasurfaces, whose optical response can be dynamically tuned postfabrication, thus allowing a plurality of applications unattainable with traditional bulk optics. Designing reconfigurable optics based on active metasurfaces is, however, presented with a unique challenge, since the optical quality of the devices must be optimized at multiple optical states. In this article, we provide a critical review on the active meta-optics design principles and algorithms that are applied across structural hierarchies ranging from single meta-atoms to full meta-optical devices. The discussed approaches are illustrated by specific examples of reconfigurable metasurfaces based on optical phase-change materials.

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Section: Optical Phase-change Mediamentioning

confidence: 99%

Design for quality: reconfigurable flat optics based on active metasurfaces

et al. 2020

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“…Kats et al have shown that the mid‐infrared plasmonic response of nanoantenna arrays can be modulated by using the index change of an underlying VO 2 substrate in proximity to its phase transition . Recent studies showed that, via direct thermal control, dynamically manipulated plasmonic color ( Figure a), extinction ratio, and polarization state of light (Figure 3b) can be achieved in hybrid metasurfaces integrated with VO 2 nanostructures.…”

Section: Phase Change Materialsmentioning

confidence: 99%

“…Consequently, VO 2 films have been introduced into photonic metasurfaces as a substrate that provide a highly variable dielectric environment . Nevertheless, to enable tunable responses in more sophisticated systems based on the IMT of VO 2 , the fabrication of VO 2 on other materials, including those in an amorphous phase, is desirable. For instance, to enable the active response regulation of metasurface absorbers that typically consist of three (metal/dielectric/metal) layers, VO 2 films must be grow on metallic or other amorphous thin films.…”

Section: Phase Change Materialsmentioning

confidence: 99%

Recent Progress in Active Optical Metasurfaces

Kang

Jenkins

Werner

2019

Advanced Optical Materials

146

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Evolving from metamaterials, optical metasurfaces not only inherit their unprecedented flexibility in tailoring light–matter interaction but also the generally fixed response determined by the metaatoms' geometries—an undesirable property that hinders the development of practical metadevices. Consequently, novel optical metasurfaces that can be tuned in an active manner are intensively studied in recent years. Due to their optically thin structures, optical metasurfaces present unique characteristics in the realization of dynamic tuning. In this review, a detailed summary of the recent advances in active optical metasurfaces is provided including discussions reviewing a variety of active materials and approaches that enable faster, stronger, and more accurate tuning. Beyond facilitating practical metadevices, studies of active metasurfaces have, and will continue to deepen the understandings of the interaction between light and nanostructured photonic architectures and to promote the development of nanofabrication techniques involving high‐complexity.

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“…of the dielectric multilayer before the plasmonic layer is added. The plasmonic filter comprises an array of nanoholes in a hexagonal arrangement [ 38 ] inserted in the 150 nm Au film. Figure 5a shows the normalized electric field of the surface plasmons in the hole array (top view) at peak wavelengths for NIR 1–5.…”

Section: Design Of Hybrid Multispectral Filtersmentioning

confidence: 99%

Hybrid Color Filters for Multispectral Imaging

Ya-jing

Beckett

et al. 2020

Advcd Theory and Sims

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Multispectral cameras capture images in multiple wavelengths in narrow spectral bands. They offer advanced sensing well beyond normal cameras and many single‐sensor‐based multispectral cameras are commercialized aimed at a broad range of applications, such as agroforestry research, medical analysis, and so on. However, the existing single‐sensor‐based multispectral cameras require accurate alignment to overlay each filter on image sensor pixels, which makes their fabrication very complex, especially when the number of bands is large. This paper demonstrates a new filter technology using a hybrid combination of single plasmonic layer and dielectric layers by computational simulations. A filter mosaic of various bands with narrow spectral width can be achieved with single run manufacturing processes (i.e., exposure, development, deposition, and other minor steps) regardless of the number of bands.

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A Photonic Switch Based on a Hybrid Combination of Metallic Nanoholes and Phase-change Vanadium Dioxide

Cited by 40 publications

References 55 publications

Design for quality: reconfigurable flat optics based on active metasurfaces

Design for quality: reconfigurable flat optics based on active metasurfaces

Recent Progress in Active Optical Metasurfaces

Hybrid Color Filters for Multispectral Imaging

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