Calculated and measured transmittance of a tunable metallic photonic crystal filter for terahertz frequencies

Drysdale, Timothy D.; Blaikie, Richard J.; Cumming, David R.S.
December 2003
Applied Physics Letters;12/29/2003, Vol. 83 Issue 26, p5362
Academic Journal
A tunable metallic photonic crystal filter with a mechanical tuning mechanism is demonstrated. The performance is predicted with rigorous full-vector electromagnetic simulations (finite-difference time domain). A prototype has been built and characterized in the W band (70–110 GHz) using a vector network analyzer configured for free-space measurement of S parameters. The measured filter’s passband has a quality factor of 11, a tuning range of 3.5 GHz, and insertion loss of only 1.1–1.7 dB. Device fabrication is straightforward, yielding an inexpensive, robust and compact tunable filter. © 2003 American Institute of Physics.


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