Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modal formulation for diffraction by absorbing photonic crystal slabs   A finite element-based modal formulation of diffraction of a plane wave by an
absorbing photonic crystal slab of arbitrary geometry is developed for
photovoltaic applications. The semi-analytic approach allows efficient and
accurate calculation of the absorption of an array with a complex unit cell.
This approach gives direct physical insight into the absorption mechanism in
such structures, which can be used to enhance the absorption. The verification
and validation of this approach is applied to a silicon nanowire array and the
efficiency and accuracy of the method is demonstrated. The method is ideally
suited to studying the manner in which spectral properties (e.g., absorption)
vary with the thickness of the array, and we demonstrate this with efficient
calculations which can identify an optimal geometry.

29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org