Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological membrane devices for terahertz on-chip photonics   Terahertz waves offer a profound platform for next-generation sensing,
imaging, and information communications. However, all conventional terahertz
components and systems suffer from a bulky design, sensitivity to
imperfections, and transmission losses. Here, we propose and experimentally
demonstrate on-chip integration and miniaturization of topological devices
which may address many existing drawbacks of the terahertz technology. We
design and fabricate topological devices based on valley-Hall photonic
structures that can be employed for various integrated components of on-chip
terahertz systems. More specifically, we demonstrate the valley-locked
asymmetric energy flow and mode conversion with topological straight waveguide,
multi-port couplers, wave division, and whispering gallery mode resonators. Our
devices are based on topological membrane metasurfaces which are of great
importance for developing on-chip photonics and bringing many novel features
into terahertz devices.

22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ