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PCFs have revolutionized optical guiding by using a periodic microstructured cladding.
Unlike conventional fibers, they are not limited by total internal reflection.
However, even PCFs are constrained by the diffraction limit when the core size is in the micron scale.
Our approach introduces a central air-hole defect with a diameter of only 110 nanometers, which is smaller than the guided wavelength.
This enables us to harness the slot-waveguide effect, confining light in a low-index region and overcoming the classical limit. |
IEEE/ICACT20260376 Slide.03
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