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Optics Letters

Optics Letters


  • Vol. 36, Iss. 10 — May. 15, 2011
  • pp: 1869–1871

Near-field measurement of amplitude and phase in silicon waveguides with liquid cladding

Maurice Ayache, Maziar P. Nezhad, Steve Zamek, Maxim Abashin, and Yeshaiahu Fainman  »View Author Affiliations

Optics Letters, Vol. 36, Issue 10, pp. 1869-1871 (2011)

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Heterodyne near-field scanning optical microscopy (H-NSOM) has proven useful as a tool for characterization of both amplitude and phase of on-chip photonic devices in air, but it has previously been unable to characterize devices with a dielectric overcladding, which is commonly used in practice for such devices. Here we demonstrate H-NSOM of a silicon waveguide with a liquid cladding emulating the solid dielectric. This technique allows characterization of practical devices with realistic refractive index profiles. Fourier analysis is used to estimate the effective refractive index of the mode from the measured data, showing an index shift of 0.08 from air to water cladding, which is seen to correspond well to simulations.

© 2011 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(180.4243) Microscopy : Near-field microscopy

ToC Category:

Original Manuscript: November 29, 2010
Revised Manuscript: March 30, 2011
Manuscript Accepted: April 1, 2011
Published: May 13, 2011

Maurice Ayache, Maziar P. Nezhad, Steve Zamek, Maxim Abashin, and Yeshaiahu Fainman, "Near-field measurement of amplitude and phase in silicon waveguides with liquid cladding," Opt. Lett. 36, 1869-1871 (2011)

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