TRR 142 - Quasi-bound states in the continuum for efficient second harmonic generation and spatial phase tailoring in GaAs metasurfaces (B09*)


In this project, we aim at exploiting highly efficient quasi-bound states in the continuum for optical modes in GaAs nanoresonators. The strong field confinement of these modes will be utilized to tailor the phase and emission patterns of light generated by nonlinear optical processes and to increase the efficiency of light-matter interaction in novel nonlinear optoelectronic devices. By using GaAs as material, we will make use of a strong second-order effect to target efficient harmonic generation and nonlinear holography even at lower power levels. Such a system would be of particular interest for optical security applications and nonlinear flat optical beam shaping elements.

Key Facts

Research profile area:
Optoelectronics and Photonics
Project type:
Project duration:
01/2022 - 12/2025
Funded by:

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Principal Investigators

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Prof. Dr. Cedrik Meier

Nanophotonics and Nanomaterials

About the person
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Prof. Dr. Thomas Zentgraf

Ultrafast Nanophotonics

About the person


Compact Metasurface-Based Optical Pulse-Shaping Device
R. Geromel, P. Georgi, M. Protte, S. Lei, T. Bartley, L. Huang, T. Zentgraf, Nano Letters 23 (2023) 3196–3201.
Dispersion control with integrated plasmonic metasurfaces
R. Geromel, P. Georgi, M. Protte, T. Bartley, L. Huang, T. Zentgraf, in: CLEO: Fundamental Science 2023, Optica Publishing Group, 2023.
Symmetry governed nonlinear selection rules in nanophotonics
T. Zentgraf, in: N.C. Panoiu (Ed.), Fundamentals and Applications of Nonlinear Nanophotonics, 1st ed., Elsevier, Amsterdam, 2023.
Nonlinear Dielectric Geometric-Phase Metasurface with Simultaneous Structure and Lattice Symmetry Design
B. Liu, R. Geromel, Z. Su, K. Guo, Y. Wang, Z. Guo, L. Huang, T. Zentgraf, ACS Photonics 10 (2023) 4357–4366.
Efficient Third-harmonic Generation Control with Ultrathin Dielectric Geometric-phase Metasurface
B. Liu, L. Huang, T. Zentgraf, in: Conference on Lasers and Electro-Optics, Optica Publishing Group, 2022.
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