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High-performance geometric phase elements in silica glass

High-performance geometric phase elements in silica glass
High-performance geometric phase elements in silica glass
High-precision three-dimensional ultrafast laser direct nanostructuring of silica glass resulting in multi-layered space-variant dielectric metasurfaces embedded in volume is demonstrated. Continuous phase profiles of nearly any optical component are achieved solely by the means of geometric phase. Complex designs of half-wave retarders with 90% transmission at 532 nm and >95% transmission at >1 µm, including polarization gratings with efficiency nearing 90% and computer generated holograms with phase gradient of ~0.8pi rad/µm, were fabricated. Vortex half-wave retarder generating single beam optical vortex with tunable orbital angular momentum of up to ±100ℏ is shown. High damage threshold of silica elements enables simultaneous optical manipulation of large number of micro-objects using high-power laser beams. Thus, the continuous control of torque without altering the intensity distribution was implemented in optical trapping demonstration with a total of 5 W average power, which is otherwise impossible with alternate beam shaping devices. In principle, the direct-write technique can be extended to any transparent material that supports laser assisted nanostructuring, and can be effectively exploited for the integration of printed optics into multi-functional optoelectronic systems.
2378-0967
1-9
Drevinskas, Rokas
edfc60c3-d75f-4ce5-ad22-9f027b7eeda1
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Drevinskas, Rokas
edfc60c3-d75f-4ce5-ad22-9f027b7eeda1
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Drevinskas, Rokas and Kazansky, Peter (2017) High-performance geometric phase elements in silica glass. APL Photonics, 2, 1-9, [066104]. (doi:10.1063/1.4984066).

Record type: Article

Abstract

High-precision three-dimensional ultrafast laser direct nanostructuring of silica glass resulting in multi-layered space-variant dielectric metasurfaces embedded in volume is demonstrated. Continuous phase profiles of nearly any optical component are achieved solely by the means of geometric phase. Complex designs of half-wave retarders with 90% transmission at 532 nm and >95% transmission at >1 µm, including polarization gratings with efficiency nearing 90% and computer generated holograms with phase gradient of ~0.8pi rad/µm, were fabricated. Vortex half-wave retarder generating single beam optical vortex with tunable orbital angular momentum of up to ±100ℏ is shown. High damage threshold of silica elements enables simultaneous optical manipulation of large number of micro-objects using high-power laser beams. Thus, the continuous control of torque without altering the intensity distribution was implemented in optical trapping demonstration with a total of 5 W average power, which is otherwise impossible with alternate beam shaping devices. In principle, the direct-write technique can be extended to any transparent material that supports laser assisted nanostructuring, and can be effectively exploited for the integration of printed optics into multi-functional optoelectronic systems.

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Accepted/In Press date: 12 May 2017
Published date: 2017
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 408174
URI: http://eprints.soton.ac.uk/id/eprint/408174
ISSN: 2378-0967
PURE UUID: e1ec84a8-3386-4468-be0b-976ff610054c

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Date deposited: 16 May 2017 04:02
Last modified: 07 Oct 2020 16:40

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