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We lithographically fabricate arrays of optical antennas with ~6nm gaps. The enhancement factor from surface-enhanced Raman scattering measurement is ~5 times larger than the same structure with ~18nm gaps.
Using a new technique for single-domain shear-ordering of elastomeric photonic crystals we demonstrate novel opto-elastic properties. Tensile stress experiments demonstrate coupled mechanical and optical anisotropy, producing striking colour tuning depending on the stretch direction.
We demonstrate optical manipulation of 1-μm-sized polystyrene beads in a silicon-based integrated optofluidic device. The relative velocity of the optically driven microbeads is ~14.2 μm/s and ~3.5 μm/s using 0.7-μm and 0.5-μm-thick silicon nitride waveguides.
The scratches on the surface of Al2O3 ceramics were repaired by optical near-field assisted sputtering with laser irradiation of 473-nm wavelength in a self-organized manner. Their average depth decreased from 3.2 nm to 0.79 nm.
Scattering induced mode splitting in microcavities with gain medium is detected directly using heterodyne technique without wavelength scan around resonant modes. Optical gain helps resolve small mode splittings, which might be missed in passive microcavities.
Optical dipole antennas with varying length and width are fabricated using e-beam lithography. Antennas with wider width are shown to exhibit stronger scattering while preserving the same resonance frequency.
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