Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tunable two-dimensional laser arrays with zero-phase locking   Two-dimensional (2D) laser arrays are shown to be achievable at a large scale
by exploiting the interplay of higher-order topological insulator (HOTI)
physics and the so-called non-Hermitian skin effect (NHSE). The higher-order
topology allows for the amplification and hence lasing of a single-mode
protected by a band gap; whereas the NHSE, widely known to accumulate
population in a biased direction in non-Hermitian systems, is introduced to
compete with the topological localization of corner modes. By tuning the system
parameters appropriately and pumping at one site only, a single topologically
protected lasing mode delocalized across over two dimensions emerges, with its
power widely tunable by adjusting the pump strength. Computational studies
clearly indicate that the lasing mode thus engineered is stable, and the phase
difference between nearest lasing sites is locked at zero, even after the
disorder is accounted for. The total power of the lasing mode forming a 2D
topological laser array is proportional to the area of the 2D lattice
accommodating a HOTI phase. Based on existing experiments, we further propose
to use coupled optical ring resonators as a promising platform to realize
large-scale 2D laser arrays.

28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph