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Updated: Jun 3, 2026
Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
Ultra-high resolution resonant C-shaped aperture nano-tip
Yao-Te Cheng1, Yuzuru Takashima, Yin Yuen
1Department of Materials Science and Engineering, Stanford University, 420 Via Palou Mall, Stanford, California 94305, USA. ytcheng@stanford.edu
Abstract:
We report a new optical near-field transducer comprised of a metallic nano-antenna extending from the ridge of a C-shaped metallic nano-aperture. Finite-difference time domain simulations predict that the C-aperture nano-tip (CAN-Tip) provides high intensity (650x), high optical resolution (~λ/60), and background-free near-field illumination at a wavelength of 980 nm. The CAN-Tip has an aperture resonance and tip antenna resonance which may be tuned independently, so the structure can be made resonant at ultraviolet wavelengths without being unduly small. This near-field optical resolution of 16.1 nm has been experimentally confirmed by employing the CAN-Tip as an NSOM probe.
