Far field spectrum in surface plasmon-assisted Young's double-slit 
interferometer

Kanseri, Bhaskar; Kandpal, Hem Chandra; Budhani, Ramesh Chandra

doi:10.1016/j.optcom.2012.07.136

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Far field spectrum in surface plasmon-assisted Young's double-slit interferometer

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Kanseri, Bhaskar
Quantum Radiation, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Kanseri, B., Kandpal, H. C., & Budhani, R. C. (2012). Far field spectrum in surface plasmon-assisted Young's double-slit interferometer. OPTICS COMMUNICATIONS, 285(24), 4811-4815. doi:10.1016/j.optcom.2012.07.136.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6861-7

Abstract

We derive an expression for the resultant spectral density (spectrum) at a point in the far zone for the surface plasmons modulated Young's double-slit interference setup. The resultant spectral interference law has the same form as the standard spectral interference law for the scalar fields. This resemblance in turn provides a means for determination of the modified spectral degree of coherence at the two slits. The mathematical results also show that in an interesting situation when the field is incident at one slit only, the interference can still be observed at the observation plane. These findings are verified theoretically using a wide-band source, i.e. a black-body, having a spectrum following Planck's radiation law. (C) 2012 Elsevier B.V. All rights reserved.