Strong confinement of optical fields using localized surface phonon polaritons in cubic boron nitride

Ioannis Chatzakis, Athith Krishna, James Culbertson, Nicholas Sharac, Alexander J. Giles, Michael G. Spencer, Joshua D. Caldwell

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Abstract

Phonon polaritons (PhPs) are long-lived electromagnetic modes that originate from the coupling of infrared (IR) photons with the bound ionic lattice of a polar crystal. Cubic-boron nitride (cBN) is such a polar, semiconductor material which, due to the light atomic masses, can support high-frequency optical phonons. Here we report on random arrays of cBN nanostructures fabricated via an unpatterned reactive ion etching process. Fourier-transform infrared reflection spectra suggest the presence of localized surface PhPs within the reststrahlen band, with quality factors in excess of 38 observed. These can provide the basis of next-generation IR optical components such as antennas for communication, improved chemical spectroscopies, and enhanced emitters, sources, and detectors.

Original languageEnglish
Pages (from-to)2177-2180
Number of pages4
JournalOptics Letters
Volume43
Issue number9
DOIs
StatePublished - May 1 2018

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    Chatzakis, I., Krishna, A., Culbertson, J., Sharac, N., Giles, A. J., Spencer, M. G., & Caldwell, J. D. (2018). Strong confinement of optical fields using localized surface phonon polaritons in cubic boron nitride. Optics Letters, 43(9), 2177-2180. https://doi.org/10.1364/OL.43.002177