Abstract
Transmission of terahertz (THz) electromagnetic waves through a series of nanoresonator arrays punctured in a thin metallic film is investigated. Over 30% of normalized transmitted amplitude is observed with only 0.18% of aperture-coverage, implying an electric field enhancement of 170. Increasing the coverage to 0.6% results in a 90% normalized amplitude, with a broader line width. Inspired by log-periodic antenna, we put ten nanoresonators with four different lengths per unit cell, succeeding in an ultrabroadband THz filter with one decade width between 0.2 and 2.0 THz.
Original language | English (US) |
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Article number | 121106 |
Journal | Applied Physics Letters |
Volume | 96 |
Issue number | 12 |
DOIs | |
State | Published - 2010 |
Externally published | Yes |
Bibliographical note
Funding Information:This work was supported by the Korea Science and Engineering Foundation (KOSEF) (SRC, Grant No. R11-2008-095-01000-0) and the Korea Research Foundation (KRF) grant funded by the Korea government (MEST) (Grant No. 2009-0071309), KICOS (GRL, Grant No. K20815000003), Seoul Science Fellowship, and the Seoul R&BD Program (Program No. 10543).