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Infrared filters for high‐efficiency thermovoltaic devices
Author(s) -
Wu TeKao
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(199705)15:1<9::aid-mop4>3.0.co;2-l
Subject(s) - band pass filter , microwave , wavelength , aperture (computer memory) , optics , infrared , optoelectronics , materials science , electrical engineering , filter (signal processing) , engineering , electronic engineering , physics , telecommunications , mechanical engineering
Three different infrared filter designs are described for application in high‐efficiency thermovoltaic power systems. They are two‐dimensional periodic grid arrays with square‐loop, circular‐loop, or cross aperture (or slot) elements printed on thin dielectric films. These three filters' bandpass performances are demonstrated to transmit the wavelength that can be efficiently converted to electricity, and to reflect other wavelengths back to the heat source, hence conserving energy and increasing the power system's efficiency. The design with cross slot elements exhibits the highest Q bandpass property (or the fastest cutoff for out‐of‐band wavelength). © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 15: 9–12, 1997.