Beilstein J. Nanotechnol.2020,11, 829–842, doi:10.3762/bjnano.11.68
the influence of surfaces. We report the design (including simulations), fabrication and performance demonstration for multi-waveguide devices, using our Si3N4 waveguiding platform as the basis. The designed ridgewaveguides, optimized for trapping and Raman spectroscopy, emit narrow beams. Multiple
waveguides.
Keywords: Brownian motion; integrated optics devices; lab-on-a-chip; optical trapping; nanofabrication; Raman spectroscopy; ridgewaveguides; Introduction
Photonic lab-on-a-chip (LOC) techniques strongly attract attention for the manipulation and measurement of biological particles such as
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Figure 1:
Schematic of the device concept with four excitation waveguides. A single detection waveguide of a ...
Beilstein J. Nanotechnol.2013,4, 300–305, doi:10.3762/bjnano.4.33
above. Here we employ partially etched ridgewaveguides as shown in the image in Figure 1b. By using such a waveguide geometry, the optical mode is confined more deeply into the diamond thin film compared to fully etched strip waveguides. This way, scattering effects due to the remaining surface
roughness are reduced. Furthermore, we do not remove the Fox15 silica layer on top of the waveguide, which provides a further alleviation of scattering on the diamond top surface.
In order to access the optical properties of the ridgewaveguides light needs to be transmitted through on-chip devices. While
diamond ridgewaveguides. Since scattering loss is the dominant loss channel, in future work further improvement of the propagation loss will be possible by using surface polishing procedures to reduce the as-grown surface roughness.
Discussion
Our implementation of wafer-scale diamond-on-insulator
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Figure 1:
(a) AFM image of the as-grown surface of microcrystalline diamond-on-insulator substrates. Mean sur...