Please use this identifier to cite or link to this item:
http://hdl.handle.net/1843/46702| Type: | Artigo de Periódico |
| Title: | Laguerre-Gauss beam generation in IR and UV by subwavelength surface-relief gratings |
| Authors: | Larissa Vertchenko Evgeniy Shkondin Radu Malureanu Carlos Henrique Monken |
| Abstract: | The 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. |
| Subject: | Birrefrigência Microfabricação |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | https://doi.org/10.1364/OE.25.005917 |
| URI: | http://hdl.handle.net/1843/46702 |
| Issue Date: | 6-Mar-2017 |
| metadata.dc.url.externa: | https://opg.optica.org/oe/fulltext.cfm?uri=oe-25-6-5917&id=360622 |
| metadata.dc.relation.ispartof: | Optics Express |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Laguerre-Gauss beam generation in IR and UV.pdf | 4.87 MB | Adobe PDF | View/Open |
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