Photonics Research, 2017, 5 (5): 05000494, Published Online: Sep. 30, 2017
Ultra-thin Bloch-surface-wave-based reflector at telecommunication wavelength
Abstract
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.
R. Dubey, B. Vosoughi Lahijani, M. H?yrinen, M. Roussey, M. Kuittinen, H. P. Herzig. Ultra-thin Bloch-surface-wave-based reflector at telecommunication wavelength[J]. Photonics Research, 2017, 5(5): 05000494.