A5062633686- Photonic Crystals and Applications
- Photonic and Optical Devices
- Topological Materials and Phenomena
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Advanced Optical Imaging Technologies
University of Kaiserslautern
2021
In the last decade, symmetry-protected bound states in continuum (BICs) have proven to be an important design principle for creating and enhancing devices reliant upon with high quality (Q) factors, such as sensors, lasers, those harmonic generation. However, we show, current implementations of BICs photonic crystal slabs can only found at center Brillouin zone below Bragg-diffraction limit, which fundamentally restricts their use single-frequency applications. By 3D-micro printing a...
Weyl points are point degeneracies that occur in momentum space of periodic materials, and associated with a quantized topological charge. We experimentally observe 3D micro-printed photonic crystal charge-2 can be split into two charge-1 as the protecting symmetry original is broken. Moreover, we use theoretical analysis to confirm where move within Brillouin zone strength breaking increases, it experiments using Fourier-transform infrared spectrometry. This micro-scale observation control...
Weyl Points points are topological degeneracies in the band structure of periodic media that robust against perturbations due to their integer charge. In article number 2100452, Christina Jörg and co-workers experimentally demonstrate splitting a quadratic point charge-2 into two linear with charge-1 3D micro-printed photonic crystals measure angle-resolved spectrum near-infrared via Fourier-transform infrared spectroscopy.
We experimentally demonstrate splitting of a charge-2 Weyl point into two charge-1 points in 3D micro-printed photonic crystal. measure its angle-resolved spectrum the near-infrared via Fourier-transform infrared spectroscopy.