Topological lasing and self-induced transparency in two level systems

Abstract

The use of virtually lossless topologically isolated edge states may lead to a novel class of thresholdless lasers operating without inversion. One needs however to understand if topological states may be coupled to external radiation and act as active cavities. We study a two-level topological insulator and show that self-induced transparency pulses can directly excite edge states. We simulate laser emission by a suitable designed topological cavity, and show that it can emit tunable radiation. For a configuration of sites following the off-diagonal Aubry-Andre-Harper model we solve the Maxwell-Bloch equations in the time domain and provide a first principle confirmation of topological lasers. Our results open the road to a new class of light emitters with topological protection for applications ranging from low-cost energetically-effective integrated lasers sources, also including silicon photonics, to strong coupling devices for studying ultrafast quantum processes with engineered vacuum.

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• Topological Photonics
• Topological Acoustics
• Observation of Topological Phase Transitions in Photonic Quasicrystals
• Topological Polaritons
• Dynamic light diffusion, Anderson localization and lasing in disordered inverted opals: 3D ab-initio Maxwell-Bloch computation
• Radiative topological states in resonant photonic crystals
• Phase spectroscopy of topological invariants in photonic crystals
• Resonant Fibonacci Quantum Well Structures

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• Topological Valley Hall Edge State Lasing
• Theory of Topological Corner State Laser in Kagome Waveguide Arrays
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• Theory of chiral edge state lasing in a two-dimensional topological system
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• Dynamically Emerging Topological Phase Transitions in Nonlinear Interacting Soliton Lattices
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• Tunable two-dimensional laser arrays with zero-phase locking
• Lasing in optically induced gap states in photonic graphene
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• Two Classes of Singularities and Novel Topology in a Specially Designed Synthetic Photonic Crystals
• Topological phonon polariton enhanced radiative heat transfer in bichromatic nanoparticle arrays mimicking Aubry-André-Harper model
• Linearized theory of the fluctuation dynamics in 2D topological lasers
• Supersymmetric non-Hermitian topological interface laser
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• Design of a room-temperature topological exciton-polariton laser in a ZnO/TiO${}_2$-photonic crystal slab
• Dynamical stability of 2D topological lasers
• Giga fine-structure constant in photonic solitons
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