Akosman, Ahmet E.Mutlu, MehmetKurt, H.Özbay, Ekmel2016-02-082016-02-082012-02-280921-4526http://hdl.handle.net/11693/28158Conference name: Proceedings of the conference - Wave Propagation: From Electrons to Photonic Crystals and Metamaterials in honor of Prof. C. M. Soukoulis’ 60th birthdayDate of Conference: 8-11 June 2011A dual-frequency division de-multiplexing mechanism is demonstrated using cascaded photonic crystal waveguides with unequal waveguide widths. The de-multiplexing mechanism is based on the frequency shift of the waveguide bands for the unequal widths of the photonic crystal waveguides. The modulation in the waveguide bands is used for providing frequency selectivity to the system. The slow light regime of the waveguide bands is utilized for extracting the desired frequency bands from a wider photonic crystal waveguide that has a relatively larger group velocity than the main waveguide for the de-multiplexed frequencies. In other words, the wider spatial distribution of the electric fields in the transverse direction of the waveguide for slow light modes is utilized in order to achieve the dropping of the modes to the output channels. The spectral and spatial de-multiplexing features are numerically verified. It can be stated that the presented mechanism can be used to de-multiplex more than two frequency intervals by cascading new photonic crystal waveguides with properly selected widths.EnglishDe-multiplexerOptical communicationPhotonic crystalSlow lightDe-multiplexerDual frequencyFrequency intervalsFrequency selectivityFrequency shiftGroup velocitiesLight regimeOutput channelsPhotonic crystal waveguideTransverse directionsElectric fieldsFrequency bandsLaser opticsMultiplexingMultiplexing equipmentOptical communicationPhotonic crystalsSlow lightWaveguidesOptical waveguidesConference Paper10.1016/j.physb.2012.02.024