US Patent 7420156 - Metal nanowire bandpass filter

http://www.freepatentsonline.com/7420156.html

This patent from the University of Pittsburgh teaches the formation of a bandpass filter formed of nanowires useful to applications in spectrometry and analyte detection. Claim 1 reads:

1. A band pass filter comprising a metal nanowire array, wherein:

the array comprises a plurality of nanowires separated by slit shaped radiation transparent regions;

the nanowires comprise metal islands located over a radiation transparent substrate; and

the metal islands have a thickness of between 100 nm and 250 nm.