Ultra-thin Bloch-surface-wave-based reflector at telecommunication wavelength
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CitationDubey R. Vosoughi Lahijani B. Häyrinen M. Roussey M. Kuittinen M. Herzig HP. (2017). Ultra-thin Bloch-surface-wave-based reflector at telecommunication wavelength. Photonics Research, 5 (5) , 494-499. 10.1364/PRJ.5.000494.
We experimentally demonstrate the optical properties of gratings engraved in a single-mode waveguide fabricated on top of a dielectric multilayer platform. The structure can be approached as a reflector for Bloch-surface-wave-based two-dimensional optical systems. The gratings have been fabricated on a thin (∼𝜆/25) titanium dioxide layer with a thickness of a few tens of nanometers deposited on the top of a multilayer platform. The optical properties of the gratings have been characterized in the near field with the aid of multi-heterodyne scanning near-field optical microscopy. We investigate the surface wave’s interference pattern, produced by incident and reflected light in front of the gratings. The presented gratings behave as an efficient Bloch-surface–wave-based reflector at telecommunication wavelength.