1. Femtosecond Broadband Frequency Switch of Terahertz Three-Dimensional Meta-Atoms
- Author
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Kenneth Maussang, Stelios Tzortzakis, P. Goulain, Joshua R. Freeman, Edmund H. Linfield, Raffaele Colombelli, Bruno Paulillo, Jean-Michel Manceau, Anastasios D. Koulouklidis, Lianhe Li, Sukhdeep Dhillon, Christina Daskalaki, Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institute of Electronic Structure and Laser (FORTH-IESL), Foundation for Research and Technology - Hellas (FORTH), ICFO – The Institute of Photonic Sciences (ICFO – The Institute of Photonic Sciences), Laboratoire de physique de l'ENS - ENS Paris (LPENS), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Nano-THz, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), School of Electronic and Electrical Engineering, University of Leeds (University of Leeds), Laboratoire de physique de l'ENS - ENS Paris (LPENS (UMR_8023)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris)
- Subjects
Materials science ,Field (physics) ,Terahertz radiation ,02 engineering and technology ,01 natural sciences ,Gallium arsenide ,010309 optics ,chemistry.chemical_compound ,0103 physical sciences ,Broadband ,Electrical and Electronic Engineering ,ComputingMilieux_MISCELLANEOUS ,[PHYS]Physics [physics] ,Range (particle radiation) ,business.industry ,Resonance ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,chemistry ,Femtosecond ,Optoelectronics ,0210 nano-technology ,business ,Ultrashort pulse ,Biotechnology - Abstract
We present the experimental demonstration of a subpicosecond all-optical THz switch based on three-dimensional (3D) terahertz meta-atoms. Combining a special design of 3D meta-devices and the ultrafast dynamics of low temperature grown gallium arsenide, we can modulate the reflectance of the THz microcavities within 2.2 ps. The device enables a 280 GHz switch in resonance frequency within less than 200 fs. The switch back to the original resonance takes 800 fs. Experimental results show that the speed values are strongly convoluted by the THz probing field and, thus, the real switching times are even shorter, in the few 100 fs range.
- Published
- 2021