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We investigate a novel design of NIM modulator for optical communication. Numerical studies indicate a strong modulation of fiber-guided signal. Experimental observation verifies simulation results, that shows the good potential for on-fiber small footprint modulator.

We measured the phase delay of the squeezed light emerging from individual plasmonic holes on thin metal film by confocal microscope. A large phase shift has been observed, beyond prediction from earlier theoretical models.

The pressing need for energy conversion devices with higher efficiency and the pursuit for nano-scale sensing have called for intense research in the use of plasmonic nanostructures. In this work, we discuss fabrication and characterization of bowtie antennas with gaps down to 10 nm for optical frequencies. With structures as simple as equilateral triangles, we observed an extinction cross section of ten times the geometrical cross section, which is twice the value previously reported. Finally, we measured the scattering profile of a series of bowtie antennas with increased size using confocal microscopy.

We investigate a novel design of negative index metamaterial modulator integrated on optical fiber. Numerical studies indicate strong modulation of fiber-guided optical signal, when the resonance frequency of the metamaterial is detuned with optical excitation.

We present cathodoluminescence (CL) imaging of nanoscale air bubble trapped in between thin amorphous silicon layer and silver. Interestingly, multiple fringes due to enhanced luminescence with strong dependence on the air gap are observed.