Control of self-collimated Bloch waves by partially flat equifrequency contours in photonic crystals

Ahyoung Kim, K. B. Chung, J. W. Wu

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Self-collimation effects in photonic crystals are generally investigated by employing flat equifrequency contours. Here we report, based on a partially flat equifrequency contour inducing two different group velocity vectors, the simultaneous excitation of dual self-collimated beams and the selective excitation of either of them by varying the incident angle or the width of an input Gaussian beam. With combination of the finite-difference time-domain simulation and the Fourier analysis as well as the wave vector diagram, we analyze the refractive behaviors of these self-collimated Bloch waves.

Original languageEnglish
Article number251120
JournalApplied Physics Letters
Volume89
Issue number25
DOIs
StatePublished - 2006

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