Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study
In this paper, we report a direct imaging of narrow-band super Planckian thermal radiation in the far field, emitted from a resonant-cavity/tungsten photonic crystal (cavity/W-PC). A spectroscopic study of the cavity/W-PC shows a distinct resonant peak at λ...
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2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8879590/ |
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| author | Mei-Li Hsieh Shawn-Yu Lin Sajeev John James A. Bur Xuanjie Wang Shankar Narayanan Ting-Shan Luk |
| author_facet | Mei-Li Hsieh Shawn-Yu Lin Sajeev John James A. Bur Xuanjie Wang Shankar Narayanan Ting-Shan Luk |
| author_sort | Mei-Li Hsieh |
| collection | DOAJ |
| description | In this paper, we report a direct imaging of narrow-band super Planckian thermal radiation in the far field, emitted from a resonant-cavity/tungsten photonic crystal (cavity/W-PC). A spectroscopic study of the cavity/W-PC shows a distinct resonant peak at λ ∼ 1.7 μm. Furthermore, an infrared CCD camera was used to record radiation image of the cavity/W-PC and a carbon-nanotube (CNT) black reference at λ ∼ 1.7 μm emitted from the same sample. The recorded image displays a higher brightness emitted from the cavity/W-PC region than from the blackbody region for all temperatures tested, T = 530–650 K. This observation is in sharp contrast to the common understanding of equilibrium thermal radiation, namely, a blackbody has a unit absorptance, a unity emittance and should emits the strongest radiation. Since the image was taken from the same sample and the temperature difference across the W-PC/ CNT boundary is less than 0.1 K, the observed image contrast gives a truly convincing evidence of super Planckian behavior in our sample. The discovery of a super-intense, narrow band radiation from a heated W-PC could open up a new door for realizing narrow band infrared emitters. The W-PC filament could also be very useful for efficient energy applications such as thermo-photovoltaics, waste heat recycling and radiative cooling. |
| format | Article |
| id | doaj-art-91b59414c7f441ff9950b01f933ffc79 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-91b59414c7f441ff9950b01f933ffc792025-08-20T03:32:50ZengIEEEIEEE Photonics Journal1943-06552019-01-011161810.1109/JPHOT.2019.29489958879590Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging StudyMei-Li Hsieh0Shawn-Yu Lin1https://orcid.org/0000-0003-1315-022XSajeev John2James A. Bur3Xuanjie Wang4Shankar Narayanan5Ting-Shan Luk6Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, USADepartment of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, USADeptartment of Physics, University of Toronto, Toronto, ON, CanadaDepartment of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, USADepartment of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY, USADepartment of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY, USASandia National Laboratory, Albuquerque, NM, USAIn this paper, we report a direct imaging of narrow-band super Planckian thermal radiation in the far field, emitted from a resonant-cavity/tungsten photonic crystal (cavity/W-PC). A spectroscopic study of the cavity/W-PC shows a distinct resonant peak at λ ∼ 1.7 μm. Furthermore, an infrared CCD camera was used to record radiation image of the cavity/W-PC and a carbon-nanotube (CNT) black reference at λ ∼ 1.7 μm emitted from the same sample. The recorded image displays a higher brightness emitted from the cavity/W-PC region than from the blackbody region for all temperatures tested, T = 530–650 K. This observation is in sharp contrast to the common understanding of equilibrium thermal radiation, namely, a blackbody has a unit absorptance, a unity emittance and should emits the strongest radiation. Since the image was taken from the same sample and the temperature difference across the W-PC/ CNT boundary is less than 0.1 K, the observed image contrast gives a truly convincing evidence of super Planckian behavior in our sample. The discovery of a super-intense, narrow band radiation from a heated W-PC could open up a new door for realizing narrow band infrared emitters. The W-PC filament could also be very useful for efficient energy applications such as thermo-photovoltaics, waste heat recycling and radiative cooling.https://ieeexplore.ieee.org/document/8879590/Nano-photonicsphotonic crystalsnovel photon sourcesphotonic materials and engineered photonic structures. |
| spellingShingle | Mei-Li Hsieh Shawn-Yu Lin Sajeev John James A. Bur Xuanjie Wang Shankar Narayanan Ting-Shan Luk Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study IEEE Photonics Journal Nano-photonics photonic crystals novel photon sources photonic materials and engineered photonic structures. |
| title | Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study |
| title_full | Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study |
| title_fullStr | Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study |
| title_full_unstemmed | Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study |
| title_short | Super Planckian Thermal Radiation Emitted From a Nano-Filament of Photonic Crystal: A Direct Imaging Study |
| title_sort | super planckian thermal radiation emitted from a nano filament of photonic crystal a direct imaging study |
| topic | Nano-photonics photonic crystals novel photon sources photonic materials and engineered photonic structures. |
| url | https://ieeexplore.ieee.org/document/8879590/ |
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