Heterodyne near-field scanning optical microscopy with spectrally broad sources
- 20 April 2009
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 34 (9) , 1327-1329
Abstract
We propose to use low-coherence-length cw optical sources with a broad spectrum in heterodyne near-field scanning microscopy in order to imitate optical pulse propagation and to obtain information about spectrally variant properties of nanophotonic components. The dispersion difference in the interferometer arms for a symmetric acousto-optic modulator arrangement is shown to be negligible over appreciable bandwidths. Demonstration of the principle of operation and viability of this approach is provided by measurement of the group refractive index of a silicon channel waveguide.Keywords
Funding Information
- Defense Advanced Research Projects Agency (DARPA)
- National Science Foundation (NSF)
- NSF Center for Integrated Access Networks Engineering Research Center
- U.S. Air Force Office of Scientific Research (AFOSR)
- U.S. Army Research Office (ARO)
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