Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous Non-linear Optical Response Of Graphene Near Phonon Resonances   In this work we probe the third-order non-linear optical property of
graphene, hexagonal boron nitride and their heterostructure by the use of
coherent anti-Stokes Raman Spectroscopy. When the energy difference of the two
input fields match the phonon energy, the anti-Stokes emission intensity is
enhanced in h-BN, as usually expected while for graphene a anomalous decrease
is observed. This behaviour can be understood in terms of q coupling between
the electronic continuum and a discrete phonon state. We have also measured a
graphene/h-BN heterostructure and demonstrate that the anomalous effect in
graphene dominates the heterostructure optical response.

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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: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th