Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Negative Refraction, Beam Steering, Mode Switching, and High-pass
  Filtering in a 1-D Periodic Laminate   In this paper we show that a 1-D phononic crystal (laminate) can exhibit
metamaterial wave phenomenon which is traditionally associated with 2-, and 3-D
crystals. Moreover, due to the absence of a length scale in 2 of its
dimensions, it can outperform higher dimensional crystals on some measures.
This includes allowing only negative refraction over large frequency ranges and
serving as a near-omnidirectional high-pass filter up to a large frequency
value. First we provide a theoretical discussion on the salient characteristics
of the dispersion relation of a laminate and formulate the solution of an
interface problem by the application of the normal mode decomposition
technique. We present a methodology with which to induce a pure negative
refraction in the laminate. As a corollary to our approach of negative
refraction, we show how the laminate can be used to steer beams over large
angles for small changes in the incident angles (beam steering). Furthermore,
we clarify how the transmitted modes in the laminate can be switched on and off
by varying the angle of the incident wave by a small amount. Finally, we show
that the laminate can be used as a remarkably efficient high-pass frequency
filter. An appropriately designed laminate will reflect all plane waves from
quasi-static to a large frequency, incident at it from all angles except for a
small set of near-normal incidences. This will be true even if the homogeneous
medium is impedance matched with the laminate. Due to the similarities between
SH waves and EM waves it is expected that some or all of these results may also
apply to EM waves in a layered periodic dielectric.

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The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph