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

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

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)21074
JournalOptics Express
Volume19
Issue number21
DOIs
StatePublished - Oct 7 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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