The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Susumu Noda - One of the best experts on this subject based on the ideXlab platform.
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Thermal Emission control by photonic crystals
2016Co-Authors: Susumu NodaAbstract:Converting from a broadband to a narrowband Thermal Emission spectrum with minimal loss of energy is important in the creation of efficient environmental sensors and biosensors as well as thermo-photovoltaic power generation systems. In the first part of my talk, I would like to discuss about such Thermal Emission control. It is shown that the Emission peak intensity can be much greater than that of a blackbody sample and the Emission bandwidth are narrowed significantly (Q>30∼100) by controlling the electronic and photonic states, under the same input power and Thermal management conditions. Another issue in Thermal Emission is that high-speed modulation is difficult to achieve because the intensity of Thermal Emission is usually determined by the temperature, and the frequency of temperature modulation is limited to 10–100 Hz even when the Thermal mass of the object is small. In the second part of my talk, I would like to discuss about the dynamic control of Thermal Emission via the control of emissivity (absorptivity), at a speed much faster than is possible using the conventional temperature-modulation method.
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realization of narrowband Thermal Emission with optical nanostructures
Optica, 2015Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The control of Thermal Emission spectra using optical resonances has been attracting increased attention both with respect to fundamental science and for various applications, including infrared sensing, Thermal imaging, and thermophotovoltaics. In this mini-review, we describe the recent experimental demonstrations of narrowband Thermal Emission with optical nanostructures, including metallic cavities, metamaterials, and all-dielectric photonic crystals. The spectral features of the controlled Thermal Emission (e.g., wavelength, linewidth, peak emissivity, and angular characteristics) are strongly dependent on the choice of both materials and structures of the emitters. Through the appropriate design of optical nanostructures, arbitrary shaping of Thermal Emission spectra, from single-peak ultra-narrowband (Q>100) Emission for midinfrared sensing to a stepwise emissivity spectrum for thermophotovoltaics, has been successfully realized.
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realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The dynamic control of Thermal Emission via the control of emissivity through intersubband absorption in n-type quantum wells, at a speed four orders of magnitude faster than is currently possible, is now demonstrated.
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Realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:Thermal Emission in the infrared range is important in various fields of research, including chemistry, medicine and atmospheric science. Recently, the possibility of controlling Thermal Emission based on wavelength-scale optical structures has been intensively investigated with a view towards a new generation of Thermal Emission devices. However, all demonstrations so far have involved the 'static' control of Thermal Emission; high-speed modulation of Thermal Emission has proved difficult to achieve because the intensity of Thermal Emission from an object is usually determined by its temperature, and the frequency of temperature modulation is limited to 10-100 Hz even when the Thermal mass of the object is small. Here, we experimentally demonstrate the dynamic control of Thermal Emission via the control of emissivity (absorptivity), at a speed four orders of magnitude faster than is possible using the conventional temperature-modulation method. Our approach is based on the dynamic control of intersubband absorption in n-type quantum wells, which is enhanced by an optical resonant mode in a photonic crystal slab. The extraction of electrical carriers from the quantum wells leads to an immediate change in emissivity from 0.74 to 0.24 at the resonant wavelength while maintaining much lower emissivity at all other wavelengths.
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conversion of broadband to narrowband Thermal Emission through energy recycling
Nature Photonics, 2012Co-Authors: Menaka De Zoysa, Takuya Inoue, Takashi Asano, Keita Mochizuki, Ardavan Oskooi, Susumu NodaAbstract:By constructing a Thermal Emission control device based on a multiple-quantum-well layer embedded in a two-dimensional photonic crystal, researchers demonstrate that they can convert a broadband Thermal Emission spectrum into a narrowband spectrum with minimal loss of energy.
Takuya Inoue - One of the best experts on this subject based on the ideXlab platform.
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realization of narrowband Thermal Emission with optical nanostructures
Optica, 2015Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The control of Thermal Emission spectra using optical resonances has been attracting increased attention both with respect to fundamental science and for various applications, including infrared sensing, Thermal imaging, and thermophotovoltaics. In this mini-review, we describe the recent experimental demonstrations of narrowband Thermal Emission with optical nanostructures, including metallic cavities, metamaterials, and all-dielectric photonic crystals. The spectral features of the controlled Thermal Emission (e.g., wavelength, linewidth, peak emissivity, and angular characteristics) are strongly dependent on the choice of both materials and structures of the emitters. Through the appropriate design of optical nanostructures, arbitrary shaping of Thermal Emission spectra, from single-peak ultra-narrowband (Q>100) Emission for midinfrared sensing to a stepwise emissivity spectrum for thermophotovoltaics, has been successfully realized.
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realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The dynamic control of Thermal Emission via the control of emissivity through intersubband absorption in n-type quantum wells, at a speed four orders of magnitude faster than is currently possible, is now demonstrated.
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Realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:Thermal Emission in the infrared range is important in various fields of research, including chemistry, medicine and atmospheric science. Recently, the possibility of controlling Thermal Emission based on wavelength-scale optical structures has been intensively investigated with a view towards a new generation of Thermal Emission devices. However, all demonstrations so far have involved the 'static' control of Thermal Emission; high-speed modulation of Thermal Emission has proved difficult to achieve because the intensity of Thermal Emission from an object is usually determined by its temperature, and the frequency of temperature modulation is limited to 10-100 Hz even when the Thermal mass of the object is small. Here, we experimentally demonstrate the dynamic control of Thermal Emission via the control of emissivity (absorptivity), at a speed four orders of magnitude faster than is possible using the conventional temperature-modulation method. Our approach is based on the dynamic control of intersubband absorption in n-type quantum wells, which is enhanced by an optical resonant mode in a photonic crystal slab. The extraction of electrical carriers from the quantum wells leads to an immediate change in emissivity from 0.74 to 0.24 at the resonant wavelength while maintaining much lower emissivity at all other wavelengths.
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conversion of broadband to narrowband Thermal Emission through energy recycling
Nature Photonics, 2012Co-Authors: Menaka De Zoysa, Takuya Inoue, Takashi Asano, Keita Mochizuki, Ardavan Oskooi, Susumu NodaAbstract:By constructing a Thermal Emission control device based on a multiple-quantum-well layer embedded in a two-dimensional photonic crystal, researchers demonstrate that they can convert a broadband Thermal Emission spectrum into a narrowband spectrum with minimal loss of energy.
Yusuf Leblebici - One of the best experts on this subject based on the ideXlab platform.
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high spatial resolution subsurface Thermal Emission microscopy
Applied Physics Letters, 2004Co-Authors: S B Ippolito, S A Thorne, M G Eraslan, B B Goldberg, M S Unlu, Yusuf LeblebiciAbstract:We apply the numerical aperture increasing lens technique to subsurface Thermal Emission microscopy of Si integrated circuits. We achieve improvements in the amount of light collected and the spatial resolution, well beyond the limits of conventional Thermal Emission microscopy. We experimentally demonstrate a lateral spatial resolution of 1.4 μm and a longitudinal spatial resolution of 7.4 μm, for Thermal imaging at free space wavelengths up to 5 μm.
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high spatial resolution subsurface Thermal Emission microscopy
Lasers and Electro-Optics Society Meeting, 2003Co-Authors: S B Ippolito, S A Thorne, M G Eraslan, B B Goldberg, M S Unlu, Yusuf LeblebiciAbstract:In this paper, we demonstrate the improvement the numerical aperture increasing lens (NAIL) yields in Thermal Emission microscopy of Si ICs. Current Si IC technology has reached submicron process size scales, well beyond the spatial resolution capability of conventional Thermal Emission microscopy. Thermal Emission microscopy measures the spatial distribution of temperature in a sample. The spatial distribution of temperature within a sample can be calculated, because the optical power emitted by the sample is a function of its local temperature. To evaluate the longitudinal spatial resolution we take successive images at different defocus distances in the longitudinal direction. The FWHM of the signal from the positive defocus represents a significant improvement of the longitudinal spatial resolution over conventional Thermal Emission microscopy, where the ultimate limit is 18 /spl mu/m.
Menaka De Zoysa - One of the best experts on this subject based on the ideXlab platform.
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realization of narrowband Thermal Emission with optical nanostructures
Optica, 2015Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The control of Thermal Emission spectra using optical resonances has been attracting increased attention both with respect to fundamental science and for various applications, including infrared sensing, Thermal imaging, and thermophotovoltaics. In this mini-review, we describe the recent experimental demonstrations of narrowband Thermal Emission with optical nanostructures, including metallic cavities, metamaterials, and all-dielectric photonic crystals. The spectral features of the controlled Thermal Emission (e.g., wavelength, linewidth, peak emissivity, and angular characteristics) are strongly dependent on the choice of both materials and structures of the emitters. Through the appropriate design of optical nanostructures, arbitrary shaping of Thermal Emission spectra, from single-peak ultra-narrowband (Q>100) Emission for midinfrared sensing to a stepwise emissivity spectrum for thermophotovoltaics, has been successfully realized.
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realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The dynamic control of Thermal Emission via the control of emissivity through intersubband absorption in n-type quantum wells, at a speed four orders of magnitude faster than is currently possible, is now demonstrated.
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Realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:Thermal Emission in the infrared range is important in various fields of research, including chemistry, medicine and atmospheric science. Recently, the possibility of controlling Thermal Emission based on wavelength-scale optical structures has been intensively investigated with a view towards a new generation of Thermal Emission devices. However, all demonstrations so far have involved the 'static' control of Thermal Emission; high-speed modulation of Thermal Emission has proved difficult to achieve because the intensity of Thermal Emission from an object is usually determined by its temperature, and the frequency of temperature modulation is limited to 10-100 Hz even when the Thermal mass of the object is small. Here, we experimentally demonstrate the dynamic control of Thermal Emission via the control of emissivity (absorptivity), at a speed four orders of magnitude faster than is possible using the conventional temperature-modulation method. Our approach is based on the dynamic control of intersubband absorption in n-type quantum wells, which is enhanced by an optical resonant mode in a photonic crystal slab. The extraction of electrical carriers from the quantum wells leads to an immediate change in emissivity from 0.74 to 0.24 at the resonant wavelength while maintaining much lower emissivity at all other wavelengths.
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conversion of broadband to narrowband Thermal Emission through energy recycling
Nature Photonics, 2012Co-Authors: Menaka De Zoysa, Takuya Inoue, Takashi Asano, Keita Mochizuki, Ardavan Oskooi, Susumu NodaAbstract:By constructing a Thermal Emission control device based on a multiple-quantum-well layer embedded in a two-dimensional photonic crystal, researchers demonstrate that they can convert a broadband Thermal Emission spectrum into a narrowband spectrum with minimal loss of energy.
Takashi Asano - One of the best experts on this subject based on the ideXlab platform.
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realization of narrowband Thermal Emission with optical nanostructures
Optica, 2015Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The control of Thermal Emission spectra using optical resonances has been attracting increased attention both with respect to fundamental science and for various applications, including infrared sensing, Thermal imaging, and thermophotovoltaics. In this mini-review, we describe the recent experimental demonstrations of narrowband Thermal Emission with optical nanostructures, including metallic cavities, metamaterials, and all-dielectric photonic crystals. The spectral features of the controlled Thermal Emission (e.g., wavelength, linewidth, peak emissivity, and angular characteristics) are strongly dependent on the choice of both materials and structures of the emitters. Through the appropriate design of optical nanostructures, arbitrary shaping of Thermal Emission spectra, from single-peak ultra-narrowband (Q>100) Emission for midinfrared sensing to a stepwise emissivity spectrum for thermophotovoltaics, has been successfully realized.
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realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:The dynamic control of Thermal Emission via the control of emissivity through intersubband absorption in n-type quantum wells, at a speed four orders of magnitude faster than is currently possible, is now demonstrated.
-
Realization of dynamic Thermal Emission control
Nature Materials, 2014Co-Authors: Takuya Inoue, Menaka De Zoysa, Takashi Asano, Susumu NodaAbstract:Thermal Emission in the infrared range is important in various fields of research, including chemistry, medicine and atmospheric science. Recently, the possibility of controlling Thermal Emission based on wavelength-scale optical structures has been intensively investigated with a view towards a new generation of Thermal Emission devices. However, all demonstrations so far have involved the 'static' control of Thermal Emission; high-speed modulation of Thermal Emission has proved difficult to achieve because the intensity of Thermal Emission from an object is usually determined by its temperature, and the frequency of temperature modulation is limited to 10-100 Hz even when the Thermal mass of the object is small. Here, we experimentally demonstrate the dynamic control of Thermal Emission via the control of emissivity (absorptivity), at a speed four orders of magnitude faster than is possible using the conventional temperature-modulation method. Our approach is based on the dynamic control of intersubband absorption in n-type quantum wells, which is enhanced by an optical resonant mode in a photonic crystal slab. The extraction of electrical carriers from the quantum wells leads to an immediate change in emissivity from 0.74 to 0.24 at the resonant wavelength while maintaining much lower emissivity at all other wavelengths.
-
conversion of broadband to narrowband Thermal Emission through energy recycling
Nature Photonics, 2012Co-Authors: Menaka De Zoysa, Takuya Inoue, Takashi Asano, Keita Mochizuki, Ardavan Oskooi, Susumu NodaAbstract:By constructing a Thermal Emission control device based on a multiple-quantum-well layer embedded in a two-dimensional photonic crystal, researchers demonstrate that they can convert a broadband Thermal Emission spectrum into a narrowband spectrum with minimal loss of energy.
