Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transfer Matrix description of heterostructured spintronics Terahertz
  emission   In this work we developed an extension to the Transfer Matrix method (TMM) to
include a current source term, with the aim of describing both the transmission
and emission of THz pulses in spintronics THz emitters. The TMM with source is
derived from the Maxwell equations with a volume free current term. This
extension to the TMM allows for the study of realistic spintronics THz emitters
as multilayers of different materials with different thicknesses. We use this
to prove that, in spite of a common misconception, the drop rate of the THz
emission amplitude at higher heavy metal layer thicknesses is not related and
does not provide information about the spin diffusion length. It is instead the
effect of the increase in the parasitic absorption of the generated radiation
by the conducting parts of the spintronics THz emitter itself.

20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th