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Marcus Albrechtsen

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Articles

A quantum-coherent photon–emitter interface in the original telecom band Original

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By Marcus Albrechtsen, Juan C. Loredo, Lucio Stefan, Zhe Liu, Yu Meng, Nikolai Spitzer, Richard Warburton, Peter Lodahl, Arne Ludwig, Leonardo Midolo, Severin Krüger, Lukas L. Niekamp, Bianca F. Seyschab
| Nature Verified
Abstract Quantum dots have set benchmarks that far surpass other quantum emitters owing to their ability to deliver high-quality, high-rate and pure photons. However, achieving these exceptional capabilities at telecom wavelengths, bridging the gap to fibre-optic infrastructure and scalable silicon photonics, remains a challenge. Overcoming this difficulty demands high-quality quantum materials and devices that, despite extensive efforts, have not yet been realized.
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Observation of strong backscattering in valley-Hall photonic topological interface modes - Nature Photonics

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By Marcus Albrechtsen, Babak Vosoughi Lahijani, Rasmus Ellebæk Christiansen, Christian Anker Rosiek
| Nature Verified
Abstract The unique properties of light underpin the visions of photonic quantum technologies, optical interconnects and a wide range of novel sensors, but a key limiting factor today is losses due to either absorption or backscattering on defects. Recent developments in topological photonics have fostered the vision of backscattering-protected waveguides made from topological interface modes, but, surprisingly, measurements of their propagation losses were so far missing.
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Nanometer-scale photon confinement in topology-optimized dielectric cavities - Nature Communications

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By Marcus Albrechtsen, Nicolas Stenger, Ole Sigmund, Jesper Mørk, Babak Vosoughi Lahijani, Rasmus Ellebæk Christiansen
| Nature Verified
Abstract Nanotechnology enables in principle a precise mapping from design to device but relied so far on human intuition and simple optimizations. In nanophotonics, a central question is how to make devices in which the light-matter interaction strength is limited only by materials and nanofabrication.
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