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Diffraction-Free Bloch Surface Waves.

Ruxue Wang1, Yong Wang1, Douguo Zhang1

  • 1Department of Optics and Optical Engineering, University of Science and Technology of China , Hefei, Anhui 230026, China.

ACS Nano
|May 16, 2017
PubMed
Summary
This summary is machine-generated.

We demonstrate a novel diffraction-free Bloch surface wave on all-dielectric multilayers. This wave propagates over 110 μm, maintaining integrity through obstacles, ideal for optical probing and chip interconnections.

Keywords:
Bloch surface waveaqueous environmentdielectric multilayerdiffractiondiffraction-free propagationplasmonicsself-healing

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Area of Science:

  • Photonics and Optics
  • Materials Science

Background:

  • Bloch surface waves (BSWs) are typically confined to surfaces and can be susceptible to diffraction.
  • All-dielectric multilayers offer unique optical properties for wave manipulation.

Purpose of the Study:

  • To demonstrate a diffraction-free Bloch surface wave.
  • To explore its propagation characteristics and potential applications.

Main Methods:

  • Fabrication of all-dielectric multilayer structures.
  • Characterization of Bloch surface wave propagation using optical measurements.
  • Testing wave resilience against obstacles and fiber coupling.

Main Results:

  • A diffraction-free Bloch surface wave was sustained on all-dielectric multilayers.
  • The wave propagated over 110 μm without significant diffraction.
  • The wave maintained integrity after passing through three obstacles and a single-mode fiber.

Conclusions:

  • The demonstrated Bloch surface wave offers unprecedented diffraction-free propagation.
  • Its robustness and propagation in aqueous environments make it suitable for biosensing and optical interconnects.