Field detection by subwavelength aperture probes

Ann Roberts

doi:10.1117/12.134883

1 February 1992 Field detection by subwavelength aperture probes

Ann Roberts

Proceedings Volume 1556, Scanning Microscopy Instrumentation; (1992) https://doi.org/10.1117/12.134883
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

In this paper we consider the coupling of energy from electromagnetic waves through an electrically small aperture into a tapered metallic probe. An understanding of propagation through an aperture is essential if subwavelength resolution near-field studies of diffraction patterns are to be performed. Small-hole coupling theory is used to determine the total power transmitted into a perfectly conduction conical waveguide that approximates a tapered probe. It is found that along with the size of the coupling aperture, the most significant factor in determining the transmitted power is the radius of the waveguide at the point of coupling.

Citation Download Citation

Ann Roberts "Field detection by subwavelength aperture probes", Proc. SPIE 1556, Scanning Microscopy Instrumentation, (1 February 1992); https://doi.org/10.1117/12.134883

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