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Excitation and Imaging of Resonant Optical Modes of Au Triangular Nano-Antennas Using Cathodoluminescence Spectroscopy
Anil Kumar, Kin-Hung Fung, James C. Mabon +2
Cathodoluminescence (CL) imaging spectroscopy is an important technique to understand resonant behavior of optical nanoantennas. We report high-resolution CL spectroscopy of triang…
Broadband Acoustic Cloak for Ultrasound Waves
Shu Zhang, Chunguang Xia, Nicholas Fang
Invisibility devices based on coordinate transformation have opened up a new field of considerable interest. Such a device is proposed to render the hidden object undetectable unde…
First Jump of Microgel: Actuation Speed Enhancement by Elastic Instability
Howon Lee, Chunguang Xia, Nicholas X. Fang
Swelling-induced snap-buckling in a 3D micro hydrogel device, inspired by the insect-trapping action of Venus flytrap, makes it possible to generate astonishingly fast actuation. W…
Thin Film Absorbers Based on Plasmonic Phase Resonances
Yanxia Cui, Kin Hung Fung, Jun Xu +2
We demonstrate an efficient double-layer light absorber by exciting plasmonic phase resonances. We show that the addition of grooves can cause mode splitting of the plasmonic waveg…
Plasmon Assisted Optical Curtains
Yanxia Cui, Jun Xu, Sailing He +1
We predict an optical curtain effect, i.e., formation of a spatially invariant light field as light emerges from a set of periodic metallic nano-objects. The underlying physical me…