Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: III-nitride on silicon electrically injected microrings for nanophotonic
  circuits   Nanophotonic circuits using group III-nitrides on silicon are still lacking
one key component: efficient electrical injection. In this paper we demonstrate
an electrical injection scheme using a metal microbridge contact in thin
III-nitride on silicon mushroom-type microrings that is compatible with
integrated nanophotonic circuits with the goal of achieving electrically
injected lasing. Using a central buried n-contact to bypass the insulating
buffer layers, we are able to underetch the microring, which is essential for
maintaining vertical confinement in a thin disk. We demonstrate direct current
room-temperature electroluminescence with 440 mW/cm$^2$ output power density at
20 mA from such microrings with diameters of 30 to 50 $\mu$m. The first steps
towards achieving an integrated photonic circuit are demonstrated.

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The categories of this paper are: eess
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
2
The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int