Recently, coherent thermal emission characteristics have been demonstrated for both polarizations from a multilayer structure consisting of a one-dimensional (1D) photonic crystal (PC) coated on a silver layer, i.e., PC-on-Ag structure. The key to enabling coherent emission is to excite a surface wave at the PC-Ag interface in the stop band of the PC. A detailed experimental investigation is conducted to demonstrate coherent thermal emission in the near-infrared region from the fabricated PC-on-Ag structure. A Fourier-transform infrared spectrometer, together with a specular reflectance accessory and a polarizer, is used to measure the reflectance at incidence angles of 30° and 45°. In addition, an angle-resolved scatterometer is used to measure the reflectance at the wavelength of 891 nm. Measured reflectance shows very good temporal and spatial coherence. Furthermore, the magnitude of the evanescent waves at the PC-Ag interface is plotted in terms of the wavelength and the incidence angle. It is found that dip locations of the measured reflectance precisely match with the condition when the field intensity is largely enhanced.
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ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4276-2
PROCEEDINGS PAPER
Indirect Measurements of Coherent Thermal Emission From a Truncated Photonic Crystal Structure
B. J. Lee,
B. J. Lee
Georgia Institute of Technology, Atlanta, GA
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Y. -B. Chen,
Y. -B. Chen
Georgia Institute of Technology, Atlanta, GA
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Z. M. Zhang
Z. M. Zhang
Georgia Institute of Technology, Atlanta, GA
Search for other works by this author on:
B. J. Lee
Georgia Institute of Technology, Atlanta, GA
Y. -B. Chen
Georgia Institute of Technology, Atlanta, GA
Z. M. Zhang
Georgia Institute of Technology, Atlanta, GA
Paper No:
HT2007-32303, pp. 413-419; 7 pages
Published Online:
August 24, 2009
Citation
Lee, BJ, Chen, Y-, & Zhang, ZM. "Indirect Measurements of Coherent Thermal Emission From a Truncated Photonic Crystal Structure." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 413-419. ASME. https://doi.org/10.1115/HT2007-32303
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