Title :
Tunability of Photonic Band Gap Notch Filters
Author :
Calo, G. ; DOrazio, A. ; De Sario, Marco ; Mescia, Luciano ; Petruzzelli, Vincenzo ; Prudenzano, Francesco
Author_Institution :
Dipt. di Elettrotec. ed Elettron., Politec. di Bari, Bari
fDate :
5/1/2008 12:00:00 AM
Abstract :
A notch filter based on an index confined photonic band gap waveguide is proposed. The dropping of an electromagnetic wave having a specific wavelength is obtained by opportunely designing a periodically corrugated overlay. The selective filtering properties of the proposed structure are identified by using a computer code based on the bidirectional beam propagation method with the aid of the method of lines. The optimized design of a notch filter, characterized by a full-width half-maximum (FWHM) bandwidth of 2 nm, is given. The tunability is reached by exploiting the electroclinic effect of smectic-A * liquid crystals.
Keywords :
notch filters; optical filters; optical waveguides; photonic band gap; silicon compounds; smectic liquid crystals; Si3N4-SiO2; bidirectional beam propagation; computer code; electroclinic effect; electromagnetic wave; full-width half-maximum bandwidth; notch filters; photonic band gap waveguide; selective filtering; smectic-A * liquid crystals; tunability; Beam propagation method; WMD; beam propagation method; method of lines; method of lines (MoLs); optical waveguides; photonic crystal; photonic crystal (PhC); propagation; wavelength division multiplexing (WDM);
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2008.917848
