title: Experimental demonstration of self-collimation inside a three-dimensional photonic crystal.
abstract: We present our experimental demonstration of self-collimation inside a three-dimensional (3D) simple cubic photonic crystal at microwave frequencies. The photonic crystal was designed with unique dispersion property and fabricated by a high precision computer-controlled machine. The self-collimation modes were excited by a grounded waveguide feeding and detected by a scanning monopole. Self-collimation of electromagnetic waves in the 3D photonic crystal was demonstrated by measuring the 3D field distribution, which was shown as a narrow collimated beam inside the 3D photonic crystal but a diverged beam in the absence of the photonic crystal.
authors.affiliation: Department of Electrical and Computer Engineering, University of Delaware, Newark, 19716, USA.
authors.forename: Zhaolin
authors.initials: Z
authors.lastname: Lu
authors.forename: Shouyuan
authors.initials: S
authors.lastname: Shi
authors.forename: Janusz A
authors.initials: JA
authors.lastname: Murakowski
authors.forename: Garrett J
authors.initials: GJ
authors.lastname: Schneider
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Schuetz
authors.forename: Dennis W
authors.initials: DW
authors.lastname: Prather