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- W2020158257 abstract "The usual near-field radiation profile of a light beam emanating from a photonic crystal waveguide (PCW) has a main lobe at the center line of the waveguide. However, a centrally symmetric profile for the emission pattern with two sidelobes can be required in some applications, e.g., Y-type power dividers, wavelength multiplexers, and semiconductor lasers. With such motivations in mind, we present the design of a compact structure that deflects the beam propagation direction in this manner. The idea utilizes the manipulation of the dispersion diagram of cascaded photonic crystals by exploiting the bandgap and self-collimation properties. The waveguide mode in the PCW can be transformed from a propagating mode into a diffusive one by altering the filling factor, which, in turn, leads to off-axis light emission. By using the finite-difference time-domain method, we show that the emission takes place into free space at the inclined output surfaces of the PCW with deviation angles of ±45°." @default.
- W2020158257 created "2016-06-24" @default.
- W2020158257 creator A5048311306 @default.
- W2020158257 date "2011-09-14" @default.
- W2020158257 modified "2023-10-16" @default.
- W2020158257 title "Manipulating wavelength-selective emission with heterogeneous photonic crystals" @default.
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- W2020158257 doi "https://doi.org/10.1364/ao.50.005256" @default.
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