Tunable Goos-Hänchen shift for self-collimated beams in two-dimensional photonic crystals |
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Authors: | Aaron Matthews Yuri Kivshar |
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Institution: | Nonlinear Physics Centre and Centre for Ultra-high Bandwidth Devices for Optical Systems (CUDOS), Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia |
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Abstract: | We present finite-difference time-domain studies of the Goos-Hänchen effect observed at the reflection of a self-collimated beam from the surface of a two-dimensional photonic crystal. We describe a method of tuning the shift of the reflected beam in photonic crystals through the modification of the surface, first structurally, as a change in the radius of the surface rods, and then all-optically, with the addition of nonlinear material to the surface layer. We demonstrate all-optical tunability and intensity-dependent control of the beam shift. |
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Keywords: | 42 65 -k 42 70 Qs 78 68 +m 73 20 -r |
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