Ultra-high resolution resonant C-shaped aperture nano-tip

Yao Te Cheng, Yuzuru Takashima, Yin Yuen, Paul C. Hansen, J. Brian Leen, Lambertus Hesselink

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)5077-5085
Number of pages9
JournalOptics Express
Issue number6
StatePublished - Mar 14 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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