MetaVCSEL · On-chip Phase and Polarization Engineering of GaN-based blue/UV VCSELs via Metasurfaces
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2022-04-28 → 2024-05-31
- EU contribution
- €203,852
- Participants
- 1
- Scheme
- MSCA-IF
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Results in brief
On-chip Phase and Polarization Engineering of GaN-based blue/UV VCSELs via Metasurfaces
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.
Data: CORDIS, © European Union
Project objective
Vertical cavity surface-emitting lasers (VCSELs) play a key role in the development of modern optoelectronic technologies, thanks to their unique characteristics such as low power consumption, high modulation speed, and large-scale two-dimensional array capability. To further expand the spectral range of VCSELs from the red/near-infrared region down to the blue/UV region is attracting significant interest. This will lead to versatile applications in for example retinal scanning displays, visible light communications, chemical sensing, and sterilization of viruses and bacteria. However, blue/UV VCSELs are suffering from poor beam quality and unstable polarization property due to the lack of effective beam shaping solutions. The recent advances in two-dimensional metamaterials, also known as metasurfaces, open new perspectives for the manipulation of light properties, including amplitude, phase, and polarization with exceptional subwavelength spatial resolution. In particular, the ultra-thin, flat, and compact characteristics of metasurfaces greatly facilitate their integration with semiconductor laser for the development of a miniaturized laser system with a controllable optical wavefront. Seizing on the timely opportunities provided by the latest metasurface technologies, this project aims to develop the very first solution for on-chip beam-shaping blue/UV VCSELs by exploiting metasurface optoelectronic integration, which will unlock the potential to tailor both the phase and polarization properties of blue/UV lasers at an ultra-compact wafer-level. This will give rise to high beam quality lasers with small divergence angle and vector lasers in the blue/UV regime, paying their way toward real-world applications.
Original text from CORDIS.
Participants
- CHALMERS TEKNISKA HOGSKOLA AB · GoteborgCoordinatorSweden
Links
Data: CORDIS, © European Union