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Photonics
Special Issues
Optical Angular Momentum in Nanophotonics
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Optical Angular Momentum in Nanophotonics

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (31 July 2018) | Viewed by 11392

Special Issue Editor

Prof. Dr. Gabriel Molina-Terriza

E-Mail Website
Guest Editor
Material Physics Center, Donostia-San Sebastian, Spain
Interests: quantum optics; optical angular momentum; quantum information; nanophotonics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the last 10 years, there has been an explosion of works on applications of structured light beams in the field of Nanophotonics. In particular, the study of the interaction of nanostructures and arrays of nanoparticles with the angular momentum of light has given rise to studies on the generation of vortex beams, control of the scattering of light, localized excitation of molecules, etc.

For all these reasons, we have decided that a collection of some recent works on this broad topic would be very timely and would raise the profile of this field of research. The topics that this issue will include, but is not limited to generation of angular momentum modes with structured materials, angular momentum dependent scattering of light by nanoparticles, spin orbit interactions of light beams, metamaterials, plasmonics, etc.

This issue concentrates the works of many important contributors to this emergent field of research. This issue will be a cornerstone to defining how structuring light beams can be used to control light matter interactions at the nanoscale.

Best regards,

Prof. Dr. Gabriel Molina-Terriza
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Nanophotonics
  • Optical angular momentum
  • Light scattering
  • Metamaterials
  • Plasmonics

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Published Papers (2 papers)

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Research

15 pages, 3669 KiB  
Article
Pancharatnam–Berry Optical Elements for Spin and Orbital Angular Momentum Division Demultiplexing
by Gianluca Ruffato, Pietro Capaldo, Michele Massari, Alessia Mezzadrelli and Filippo Romanato
Photonics 2018, 5(4), 46; https://doi.org/10.3390/photonics5040046 - 3 Nov 2018
Cited by 7 | Viewed by 5228
Abstract
A Pancharatnam–Berry optical element is designed, fabricated, and optically characterized for the demultiplexing of beams with different polarization and orbital angular momentum states at the telecom wavelength of 1310 nm. The geometric phase control is achieved by fabricating properly-oriented subwavelength gratings on a [...] Read more.
A Pancharatnam–Berry optical element is designed, fabricated, and optically characterized for the demultiplexing of beams with different polarization and orbital angular momentum states at the telecom wavelength of 1310 nm. The geometric phase control is achieved by fabricating properly-oriented subwavelength gratings on a silicon substrate, inducing a spatially-variant form birefringence. The digital grating pattern is transferred to the silicon substrate with a two-step nanofabrication protocol, using inductively coupled plasma reactive ion etching to transfer the resist pattern generated with high-resolution electron beam lithography. The optical characterization of the sample confirms the expected capability to sort circularly polarized optical beams with different handedness and orbital angular momentum. Encompassing optical element design and silicon photonics, the designed silicon metasurface paves the way to innovative devices for total angular momentum mode division multiplexing with unprecedented levels of integration. Full article
(This article belongs to the Special Issue Optical Angular Momentum in Nanophotonics)
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12 pages, 4163 KiB  
Article
Determining Vortex-Beam Superpositions by Shear Interferometry
by Behzad Khajavi, Junior R. Gonzales Ureta and Enrique J. Galvez
Photonics 2018, 5(3), 16; https://doi.org/10.3390/photonics5030016 - 14 Jul 2018
Cited by 15 | Viewed by 5514
Abstract
Optical modes bearing optical vortices are important light systems in which to encode information. Optical vortices are robust features of optical beams that do not dissipate upon propagation. Thus, decoding the modal content of a beam is a vital component of the process. [...] Read more.
Optical modes bearing optical vortices are important light systems in which to encode information. Optical vortices are robust features of optical beams that do not dissipate upon propagation. Thus, decoding the modal content of a beam is a vital component of the process. In this work, we present a method to decode modal superpositions of light beams that contain optical vortices. We do so using shear interferometry, which presents a simple and effective means of determining the vortex content of a beam, and extract the parameters of the component vortex modes that constitute them. We find that optical modes in a beam are easily determined. Its modal content can be extracted when they are of comparable magnitude. The use of modes of well-defined topological charge, but not well-defined radial-mode content, such as those produced by phase-only encoding, are much easier to diagnose than pure Laguerre–Gauss modes. Full article
(This article belongs to the Special Issue Optical Angular Momentum in Nanophotonics)
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