On-chip Phase and Polarization Engineering of GaN-based blue/UV VCSELs via Metasurfaces

Información del proyecto

MetaVCSEL

Identificador del acuerdo de subvención: 101027383

DOI

10.3030/101027383

Proyecto finalizado el 26 Mayo 2023

Fecha de la firma de la CE 29 Abril 2021

Fecha de inicio 28 Abril 2022

Fecha de finalización 31 Mayo 2024

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 203 852,16

Aportación de la UE

€ 203 852,16

Coordinado por

CHALMERS TEKNISKA HOGSKOLA AB
Sweden

Periodic Reporting for period 1 - MetaVCSEL (On-chip Phase and Polarization Engineering of GaN-based blue/UV VCSELs via Metasurfaces)

Período documentado: 2022-04-28 hasta 2024-04-27

Resumen del contexto y de los objetivos generales del proyecto

Gallium nitride (GaN) based vertical cavity surface-emitting lasers (VCSELs) have attracted a wide range of interests and research efforts both from the academy and industry due to their important potential as short wavelength laser source. In this context, significant progress has been made in the past decades. However, compared with the remarkable achievements in GaN based material growth, device design and fabrication, the study on the beam shaping of GaN VCSELs falls behind, which results in the poor beam quality and unstable polarization property. To solve this problem, the overall objectives of the MetaVCSEL project include the design and fabrication of optical metasurfaces that are suitable for blue and UV applications, the development of an on-chip approach to manipulate the beam profiles of the GaN VCSELs through the integration of metasurface. The results of the MetaVCSEL have demonstrated the promising capabilities of GaN based metasurfaces and diamond based metasurfaces to control the phase and polarization states of light in blue and UV regions, respectively, which can be used for integration with GaN based VCSELs.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

The MetaVCSEL project has designed and fabricated GaN based metasurfaces and diamond based metasurfaces, which can be used to control the phase and polarization states of both the visible light and UV light. The work performed during the report period is summarized as below:
1) Numerical simulation and design of GaN based metasurface for the phase control of blue light.
2) Numerical simulation and design of diamond based metasurface for the phase control of blue light.
3) Numerical simulation and design of diamond based metasurface for the polarization control of both blue and UV light.
4) Experimental fabrication of GaN based metasurfaces.
5) Experimental fabrication of diamond based metasurfaces.
6) Optical characterization of metasurfaces

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

The MetaVCSEL project enables a feasible and ultracompact solution to control the phase profiles and polarization states of the GaN VCSELs. The expected results of the project can promote the advance of high beam quality lasers with small divergence angle and vector lasers in the blue/UV regime, which would find a wide range of applications, such as in retinal scanning displays, visible light communications, chemical sensing, and sterilization of viruses and bacteria.

the developed diamond based metalens in the DUV region