Transparent near-infrared reflector metasurface with randomly dispersed silver nanodisks

Tani, Tohru; Hakuta, Shinya; Kiyoto, Naoharu; Naya, Masayuki

doi:10.1364/oe.22.009262

Cited by 33 publications

(36 citation statements)

References 24 publications

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“…First, we briefly review the silver nanoparticle-based NASIP device 5,6 and our former numerical analysis that highlighted the inherent structural randomness of this device. 7 Figure 1(a) shows a scanning electron microscope (SEM) image of the NASIP surface.…”

Section: A Review Of the Nasip Device And Former Analysismentioning

confidence: 99%

“…The elemental nanostructure is 120-150 nm in diameter and 10 nm thick and resonates at NIR wavelengths (centered around 1000 nm). [5][6][7] To characterize the detailed electromagnetic properties of the experimentally fabricated devices, we input the geometries of the fabricated silver nanoparticles to a numerical model comprising a vast number of voxels. Specifically, the SEM image shown in Fig.…”

Section: A Review Of the Nasip Device And Former Analysismentioning

confidence: 99%

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Local circular polarizations in nanostructures induced by linear polarization via optical near-fields

Naruse

Tani

Inoue³

et al. 2015

J. Opt. Soc. Am. B

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Section: A Review Of the Nasip Device And Former Analysismentioning

confidence: 99%

Section: A Review Of the Nasip Device And Former Analysismentioning

confidence: 99%

Local circular polarizations in nanostructures induced by linear polarization via optical near-fields

Naruse

Tani

Inoue³

et al. 2015

J. Opt. Soc. Am. B

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“…1a, and a scanning electron microscope image of the surface is shown in Fig. 1b2. The elemental silver nanostructure has a diameter of about 120 to 150 nm and a thickness of 10 nm.…”

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confidence: 98%

Randomness in highly reflective silver nanoparticles and their localized optical fields

Naruse

Tani

Yasuda

et al. 2014

Sci Rep

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Reflection of near-infrared light is important for preventing heat transfer in energy saving applications. A large-area, mass-producible reflector that contains randomly distributed disk-shaped silver nanoparticles and that exhibits high reflection at near-infrared wavelengths was demonstrated. Although resonant coupling between incident light and the nanostructure of the reflector plays some role, what is more important is the geometrical randomness of the nanoparticles, which serves as the origin of a particle-dependent localization and hierarchical distribution of optical near-fields in the vicinity of the nanostructure. Here we show and clarified the unique optical near-field processes associated with the randomness seen in experimentally fabricated silver nanostructures by adapting a rigorous theory of optical near-fields based on an angular spectrum and detailed electromagnetic calculations.

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“…Furthermore, we also discuss the influence of these IR managing windows on temperature control and energy savings in the built environment. Inorganicbased window solutions, including metallic based reflective layers, [28][29][30][31] photochromic, [3,32,33] electrochromic, [3,8,[34][35][36][37][38][39] and thermochromic [3,[40][41][42][43] systems, plasmonic nanoparticles, [36,[44][45][46] aerogel glazing, [47] privacy windows, [48] thin film photovoltaics, [49] and even microfluidic [50] based windows have not been discussed in this review, as they have already received considerable attention and discussion. Additionally, organic based window devices and materials primarily intended to absorb and control visible light passage, including electro-, [51][52][53] photo-, and thermochromic [3] windows, are also beyond the scope of this review of infrared control materials: they have already been detailed in a number of excellent review articles.…”

Section: Introductionmentioning

confidence: 99%

Infrared Regulating Smart Window Based on Organic Materials

Khandelwal

Schenning

Debije

2017

Advanced Energy Materials

307

220

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(IR), here defined as light with wavelengths between 700 nm and 2500 nm, accounts for around 50% of the total energy emitted by the sun reaching Earth (Figure 1b), [3,4] and this light produces interior heating but is invisible to the unaided eye.The absorption of sunlight by building materials and passage of IR through transparent surfaces such as windows is responsible for much of the interior overheating of office rooms, automobile interiors, greenhouses, and other similar spaces. The use of artificial cooling and heating systems will only increase with the continued influence of global climate change, with energy used for cooling systems surpassing energy used for heating around the year 2070, and a 40 fold increase in air cooling energy use is expected by 2100. [5] By controlling the influx of radiant heat transfer, calculations show that more than 50% of the energy used in lighting, heating and cooling could be saved by deploying better control systems over only 18% of available window stock. [6] In areas with human inhabitants employing windows, more aspects must be considered than simply reducing the use of energy in the room: any switchable window used in, for example, a commercial office space has several other requirements that must be met before it may be installed. Among these requirement are reasonably fast switching speeds [7] (although for IR control, relatively longer times compared to visible light switching should be acceptable), good optical transparency with minimum haze, an acceptable device lifetime, [8] and functionality over a range of exterior temperatures. Controlling the excess of solar energy without compromising the visible transparency of the window is an important consideration for human health: maintaining inside/outside contact and daylighting are vital in retaining well-being and productivity, as well as providing economic and aesthetic gain by reducing the need for artificial lighting systems. [9,10] These are challenging goals for a window to realize.A number of materials have been developed over the past few decades to maintain indoor temperatures. Many of these focus on the opaque structural building elements like walls and roofing. [10][11][12][13] Other solutions target the transparent window, employing external mechanical shutters and blinds, [14] phase change materials (PCMs), [15] thermochromic materials, [16] aerogels, [17] trapped gas in fluid membranes, [18] and even phononic materials, [19] among other options. Indeed, controlling heat passage through the window in response to changing climate conditions is a great challenge; ideally, one would accomplish Windows are vital elements in the built environment that have a large impact on the energy consumption in indoor spaces, affecting heating and cooling and artificial lighting requirements. Moreover, they play an important role in sustaining human health and well-being. In this review, we discuss the next generation of smart windows based on organic materials which can change their properties by reflecting or trans...

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Transparent near-infrared reflector metasurface with randomly dispersed silver nanodisks

Cited by 33 publications

References 24 publications

Local circular polarizations in nanostructures induced by linear polarization via optical near-fields

Local circular polarizations in nanostructures induced by linear polarization via optical near-fields

Randomness in highly reflective silver nanoparticles and their localized optical fields

Infrared Regulating Smart Window Based on Organic Materials

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