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Ultra wideband terahertz absorbers
Author(s) -
Dubey Ashish,
Shami T.C.,
Bhasker Rao K. U.,
Prabhu S. S.
Publication year - 2011
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.26059
Subject(s) - terahertz radiation , molar absorptivity , broadband , microwave , wideband , metamaterial , absorption (acoustics) , metamaterial absorber , electromagnetic radiation , materials science , optoelectronics , terahertz gap , optics , frequency band , terahertz metamaterials , engineering , physics , telecommunications , tunable metamaterials , antenna (radio) , far infrared laser , laser
Most of the recent research on electromagnetic absorbers at terahertz (THz) frequencies is focused on metamaterials based absorber, which provides high absorptivity of electromagnetic (em) radiations in narrow frequency band and tailoring of em response of materials. Under this work, we have also attempted the same problem with different approach, i.e., by using combination of different materials in uniform layered configuration system. Result obtained shows em absorption of 10–20 dB in the lower and higher side of measured spectrum and high absorption of 20–30 dB in central part, i.e., from 1 to 2 THz. Materials with such broadband absorptivity find numerous military and civilian applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26059