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

Informazioni relative al progetto

MetaVCSEL

ID dell’accordo di sovvenzione: 101027383

DOI

10.3030/101027383

Progetto concluso il 26 Maggio 2023

Data della firma CE 29 Aprile 2021

Data di avvio 28 Aprile 2022

Data di completamento 31 Maggio 2024

Finanziato da

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Costo totale

€ 203 852,16

Contributo UE

€ 203 852,16

Coordinato da

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)

Periodo di rendicontazione: 2022-04-28 al 2024-04-27

Sintesi del contesto e degli obiettivi generali del progetto

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.

Lavoro eseguito dall’inizio del progetto fino alla fine del periodo coperto dalla relazione e principali risultati finora ottenuti

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

Progressi oltre lo stato dell’arte e potenziale impatto previsto (incluso l’impatto socioeconomico e le implicazioni sociali più ampie del progetto fino ad ora)

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