Control of optical orbital angular momentum by Vogel spiral arrays of metallic nanoparticles
In this Letter, we experimentally demonstrate structured light carrying multiple values of orbital angular momentum (OAM) in the farfield scattering region of Vogel spiral arrays of metallic nanoparticles. Using Fourier-Hankel mode decomposition analysis and interferometric reconstruction of the com...
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| Veröffentlicht in: | Optics letters 2012-12, Vol.37 (24), p.5076-5078 |
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| container_end_page | 5078 |
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| container_issue | 24 |
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| container_title | Optics letters |
| container_volume | 37 |
| creator | Lawrence, Nate Trevino, Jacob Dal Negro, Luca |
| description | In this Letter, we experimentally demonstrate structured light carrying multiple values of orbital angular momentum (OAM) in the farfield scattering region of Vogel spiral arrays of metallic nanoparticles. Using Fourier-Hankel mode decomposition analysis and interferometric reconstruction of the complex amplitude of scattered waves, we show the ability to encode well-defined numerical sequences, determined by the aperiodic spiral geometry, into azimuthal OAM values, in excellent agreement with analytical scattering theory. The generation of azimuthal sequences of OAM values by light scattering from engineered aperiodic surfaces is relevant to a number of device applications for secure optical communication, classical cryptography, and quantum cryptography. |
| doi_str_mv | 10.1364/OL.37.005076 |
| format | Article |
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| identifier | ISSN: 0146-9592 |
| ispartof | Optics letters, 2012-12, Vol.37 (24), p.5076-5078 |
| issn | 0146-9592 1539-4794 |
| language | eng |
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| source | Optica Publishing Group Journals |
| subjects | Angular momentum Arrays Cryptography Mathematical analysis Nanoparticles Orbitals Scattering Spirals |
| title | Control of optical orbital angular momentum by Vogel spiral arrays of metallic nanoparticles |
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