Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chip-Scale Continuously Tunable Optical Orbital Angular Momentum
  Generator   Light carrying orbital angular momentum (OAM) has potential to impact a wide
variety of applications ranging from optical communications to quantum
information and optical forces for the excitation and manipulation of atoms,
molecules, and micro-particles. The unique advantage of utilizing OAM in these
applications relies, to a large extent, on the use of multiple different OAM
states. Therefore, it is desirable to have a device that is able to gen- erate
light with freely adjustable OAM states in an integrated form for large- scale
integration. We propose and demonstrate a compact silicon photonic integrated
circuit to generate a free-space optical beam with OAM state con- tinuously
tuned from a single electrical input signal, realizing both integer and
non-integer OAM states. The compactness and flexibility of the device and its
compatibility with complementary metal-oxide-semiconductor (CMOS) pro- cessing
hold promise for integration with other silicon photonic components for
wide-ranging applications.

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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
1
The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: supr-con