Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancing Goos-H\"anchen shift based on magnetic dipole quasi-bound
  states in the continuum in all-dielectric metasurfaces   Metasurface-mediated bound states in the continuum (BIC) provides a versatile
platform for light manipulation at subwavelength dimension with diverging
radiative quality factor and extreme optical localization. In this work, we
employ magnetic dipole quasi-BIC resonance in asymmetric silicon nanobar
metasurfaces to realize giant Goos-H\"anchen (GH) shift enhancement by more
than three orders of wavelength. In sharp contrast to GH shift based on the
Brewster dip or transmission-type resonance, the maximum GH shift here is
located at the reflection peak with unity reflectance, which can be
conveniently detected in the experiment. By adjusting the asymmetric parameter
of metasurfaces, the $Q$-factor and GH shift can be modulated accordingly. More
interestingly, it is found that GH shift exhibits an inverse quadratic
dependence on the asymmetric parameter. Furthermore, we design an
ultrasensitive environmental refractive index sensor based on the quasi-BIC
enhanced GH shift, with a maximum sensitivity of 1.5$\times$10$^{7}$
$\mu$m/RIU. Our work not only reveals the essential role of BIC in engineering
the basic optical phenomena, but also suggests the way for pushing the
performance limits of optical communication devices, information storage,
wavelength division de/multiplexers, and ultrasensitive sensors.

34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat