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Title: Far-field controllable excitation of phonon polariton via nanostructure engineering
Authors: Qiang, Bo
Yuan, Guanghui
Zhao, Meng
Liu, Hong
Wang, Qi Jie
Wang, Qian
Keywords: Engineering::Nanotechnology
Issue Date: 2020
Source: Qiang, B., Yuan, G., Zhao, M., Liu, H., Wang, Q. J., & Wang, Q. (2020). Far-field controllable excitation of phonon polariton via nanostructure engineering. Optics Express, 28(26), 39156-39164. doi:10.1364/OE.410253
Journal: Optics Express 
Abstract: Hexagonal boron nitride (h-BN) as a natural mid-infrared (mid-IR) hyperbolic material which supports a strong excitation of phonon polariton (PhP) has enabled a new class of photonic devices with unprecedented functionalities. The hyperbolic property of h-BN has not only brought in new physical insights but also spurred potential applications. However, most of the current h-BN devices are designed repying on near-field excitation and manipulation of PhP. For fully realizing the potentials of h-BN, research on far-field controllable excitation and control of PhP is important for future integrated photonic devices. In this work, we exploit the designs of controllable far-field excitation of PhP in nanostructure-patterned h-BN thin film for deep subwavelength focusing (FWHM∼λ0/14.9) and interference patterns of 1D (FWHM∼λ0/52) and 2D standing waves (FWHM∼λ0/36.8) which find great potential for super-resolution imaging beyond diffraction limit. These polaritonic patterns could be easily tuned remotely by manipulating the polarization and phase of incident laser. This approach provides a novel platform for practical IR nanophotonic devices and potential applications in mid-IR bio-imaging and sensing.
ISSN: 1094-4087
DOI: 10.1364/OE.410253
Rights: © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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