Send to

Choose Destination

Links from PubMed

Opt Lett. 2003 Jun 1;28(11):938-40.

Wet-etch optimization of free-standing terahertz frequency-selective structures.

Author information

Photonics and Optoelectronic Device Center, University of Massachusetts-Lowell, Lowell, Massachusetts 01854, USA.


Free-standing frequency-selective surfaces consisting of approximately 10-microm-thick copper films with cross-aperture arrays are found to be tunable toward lower frequencies by means of wet chemical etching. Center frequencies were tuned from 1.57 to 1.53 THz while maintaining high transmittance. Wet etching also adjusts bandwidth, peak transmittance, and sidelobe transmittance. The advantage of the wet-etch technique is demonstrated by employment of these devices as bandpass filters for difluoromethane-based terahertz lasers. Adjustment in aperture dimensions because of etching results in suppression of a competing laser line (133.93 microm) by 15 dB while maintaining high transmittance at the operating wavelength of 192.06 microm.


Supplemental Content

Full text links

Icon for Optical Society of America
Loading ...
Support Center