Surface phonon coupling within boron nitride resolved by a novel near-field infrared pump-probe imaging technique

Leonid Gilburd; Xiaoji G. Xu; Sissi de Beer; Yoshio Bando; Dmitri Golberg; Gilbert C. Walker

doi:10.1117/12.2237901

11 October 2016 Surface phonon coupling within boron nitride resolved by a novel near-field infrared pump-probe imaging technique

Leonid Gilburd, Xiaoji G. Xu, Sissi de Beer, Yoshio Bando, Dmitri Golberg, Gilbert C. Walker

Author Affiliations +

Proceedings Volume 9925, Nanoimaging and Nanospectroscopy IV; 99250L (2016) https://doi.org/10.1117/12.2237901
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

The excitation of surface phonon-polariton (SPhP) modes in polar materials using scattering type near-field optical microscopy (s-SNOM) has recently become an area of interest because of its potential for application as naturally occurring meta-materials and in low-loss energy transfer. Within this area, hexagonal boron nitride (h-BN) and boron nitride nanotubes (BNNTs) are the primary structures under investigation. Here we present pump-probe continuous wave (CW) scattering-type scanning near-field optical microscopy (s-SNOM) - a novel two color pump-probe infrared technique which uses two continuous wave tunable light sources and is based on s-SNOM. The technique allows us to spatially resolve coupling of the longitudinal optical and surface phonon polariton modes in BNNTs. However, no similar coupling is observed in two-dimensional h-BN crystals.

Citation Download Citation

Leonid Gilburd, Xiaoji G. Xu, Sissi de Beer, Yoshio Bando, Dmitri Golberg, and Gilbert C. Walker "Surface phonon coupling within boron nitride resolved by a novel near-field infrared pump-probe imaging technique", Proc. SPIE 9925, Nanoimaging and Nanospectroscopy IV, 99250L (11 October 2016); https://doi.org/10.1117/12.2237901

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KEYWORDS

Boron

Near field

Absorption

Phonons

Infrared radiation

Atomic force microscopy

Infrared imaging

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