Junction-type photonic crystal waveguides for notch- and pass-band filtering

Type
Article

Authors
Shahid, Naeem
Amin, Muhammad
Naureen, Shagufta
Świłło, Marcin
Anand, S.

KAUST Department
Electrical Engineering Program
Physical Science and Engineering (PSE) Division

Online Publication Date
2011-10-07

Print Publication Date
2011-10-10

Date
2011-10-07

Abstract
Evolution of the mode gap and the associated transmission mini stop-band (MSB) as a function of photonic crystal (PhC) waveguide width is theoretically and experimentally investigated. The change of line-defect width is identified to be the most appropriate way since it offers a wide MSB wavelength tuning range. A high transmission narrow-band filter is experimentally demonstrated in a junction-type waveguide composed of two PhC waveguides with slightly different widths. The full width at half maximum is 5.6 nm; the peak transmission is attenuated by only ∼5 dB and is ∼20 dB above the MSBs. Additionally, temperature tuning of the filter were also performed. The results show red-shift of the transmission peak and the MSB edges with a gradient of dλ/dT = 0.1 nm/°C. It is proposed that the transmission MSBs in such junction-type cascaded PhC waveguides can be used to obtain different types of filters. © 2011 Optical Society of America.

Citation
Shahid, N., Amin, M., Naureen, S., Swillo, M., & Anand, S. (2011). Junction-type photonic crystal waveguides for notch- and pass-band filtering. Optics Express, 19(21), 21074. doi:10.1364/oe.19.021074

Publisher
The Optical Society

Journal
Optics Express

DOI
10.1364/OE.19.021074

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