Laguerre-Gauss beam generation in IR and UV by subwavelength surface-relief gratings

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dc.creatorLarissa Vertchenko
dc.creatorEvgeniy Shkondin
dc.creatorRadu Malureanu
dc.creatorCarlos Henrique Monken
dc.date.accessioned2022-10-27T17:38:38Z
dc.date.accessioned2025-09-09T01:10:43Z
dc.date.available2022-10-27T17:38:38Z
dc.date.issued2017-03-06
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1364/OE.25.005917
dc.identifier.issn10944087
dc.identifier.urihttps://hdl.handle.net/1843/46702
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofOptics Express
dc.rightsAcesso Aberto
dc.subjectBirrefrigência
dc.subjectMicrofabricação
dc.subject.otherOptical vortices
dc.subject.otherLaser beam shaping
dc.subject.otherSubwavelength structures
dc.subject.otherForm birefringence
dc.titleLaguerre-Gauss beam generation in IR and UV by subwavelength surface-relief gratings
dc.typeArtigo de periódico
local.citation.epage5926
local.citation.issue6
local.citation.spage5917
local.citation.volume25
local.description.resumoThe angular momentum of light can be described by the states of spin angular momentum, associated with polarization, and orbital angular momentum, related to the helical structure of the wave front. Laguerre-Gaussian beams carry orbital angular momentum and their generation can be done by using an optical device known as q-plate. However, due to the usage of liquid crystals, these components may be restricted to operate in specific wavelengths and low power sources. Here we present the fabrication and characterization of q-plates made without liquid crystals, using processes of electron beam lithography, atomic layer deposition and dry etch techniques. We exploit the phenomenon of form birefringence to give rise to the spin-to-orbital angular momentum conversion. We demonstrate that these plates can generate beams with high quality for the UV and IR range, allowing them to interact with high power laser sources or inside laser cavities.
local.identifier.orcidhttps://orcid.org/0000-0002-8347-1814
local.identifier.orcidhttps://orcid.org/0000-0002-6093-5030
local.identifier.orcidhttps://orcid.org/0000-0002-0064-1882
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://opg.optica.org/oe/fulltext.cfm?uri=oe-25-6-5917&id=360622

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