Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integrated TiO2 resonators for visible photonics   We demonstrate waveguide-coupled titanium dioxide (TiO2) racetrack resonators
with loaded quality factors of 2x10^4 for the visible wavelengths. The
structures were fabricated in sputtered TiO2 thin films on oxidized silicon
substrates using standard top-down nanofabrication techniques, and passively
probed in transmission measurements using a tunable red laser. Devices based on
this material could serve as integrated optical elements as well as passive
platforms for coupling to visible quantum emitters.

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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: econ
30
The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat