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The emission intensity from the dipole-forbidden state in a GaAs quantum-ring was increased via close proximity with an aperture fiber probe to induce a near-field interaction between the probe apex and the quantum-ring. As a result, a significant decrease was observed in the decay time of the emission from a dipole-forbidden energy state.
We show that optical nanofiber cavity can be realized by drilling periodic nano-grooves on a sub-wavelength diameter silica fiber using focused ion beam milling. Due to both transverse and longitudinal confinement of the field, such a nanofiber cavity can become a promising workbench for cavity-QED.
Thermal emission of linearly polarized and narrow-band mid-infrared waves from sub-wavelength gratings of narrow and deep plasmon cavities engraved on a Au surface has been demonstrated, and applied to simple chemical analysis.
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