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Retrofittable antireflection coatings for T‐rays
Author(s) -
Withayachumnankul Withawat,
Fischer Bernd M.,
Mickan Samuel P.,
Abbott Derek
Publication year - 2007
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/mop.22664
Subject(s) - optics , materials science , anti reflective coating , terahertz radiation , window (computing) , transmittance , coating , reflection (computer programming) , optoelectronics , microwave , layer (electronics) , wavelength , physics , nanotechnology , computer science , programming language , operating system , quantum mechanics
T‐ray reflection loss at a window's surface is reduced by means of a quarter‐wave antireflection coating. Because T‐ray wavelengths are much longer than visible wavelengths, the antireflection layer for T‐rays is much larger than the layers typically used in optics. This creates an interesting opportunity for retrofittable antireflection layers. In the experiment, an antireflection coating made from ordinary polyethylene sheets is pressed onto the surfaces of a silicon window in the way that rapid replacement of the rettrofittable coating is possible. Measured by terahertz time‐domain spectroscopy (THz‐TDS), the coated window shows enhancement of the transmittance within a range of T‐ray frequencies. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2267–2270, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22664