Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ghost sensing: the rise and role of exceptional points in planar
  geometry   We show the recently discovered ghost waves - a special class of non-uniform
electromagnetic waves in biaxial anisotropic media - can be used for optical
sensing based on exceptional points. In addition to showing high sensitivity
and precision, the proposed sensor employs simple planar geometry and is robust
against noise.

34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph