Projects per year
Abstract
The topological structure associated with the branchpoint singularity around an exceptional point (EP) can provide tools for controlling the propagation of light. Using graphene-based devices, we demonstrate the emergence of EPs in the electrically controlled interaction of light with a collection of organic molecules in the terahertz regime at room temperature. We show that the intensity and phase of terahertz pulses can be controlled by a gate voltage which drives the device across the EP. Our electrically tuneable system allows reconstructing the Riemann surface associated with the complex energy landscape and provides a topological control of light by tuning the loss-imbalance and frequency detuning of interacting modes. Our approach provides a platform for developing topological optoelectronics and studying the manifestations of EP physics in light-matter interactions.
Original language | English |
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Article number | 6589 |
Pages (from-to) | 184-188 |
Journal | Science |
Volume | 376 |
DOIs | |
Publication status | Published - 8 Apr 2022 |
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Dive into the research topics of 'Topological engineering of terahertz light using electrically tuneable exceptional point singularities'. Together they form a unique fingerprint.Projects
- 1 Finished
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Graphene-based smart surfaces: from visible to microwave (SmartGraphene)
Kocabas, C. (PI)
1/11/17 → 30/04/21
Project: Research