156 citations · 490 across the 13 of their papers we have counts for
13 papers
Optically Pumped Terahertz Amplitude Modulation in Type-II Ge QD/Si heterostructures grown via Molecular Beam Epitaxy
Suprovat Ghosh, Abir Mukherjee, Sudarshan Singh +4
This article exploits group-IV germanium (Ge) quantum dots (QDs) on Silicon-on-Insulator (SOI) grown by molecular beam epitaxy (MBE) in order to explore its optical behaviour in th…
Quantum non-demolition measurement of an electron spin qubit through its low-energy many-body spin environment
Harry E. Dyte, George Gillard, Santanu Manna +3
The measurement problem dates back to the dawn of quantum mechanics. Here, we measure a quantum dot electron spin qubit through off-resonant coupling with thousands of redundant nu…
Approaching a fully-polarized state of nuclear spins in a semiconductor quantum dot
Peter Millington-Hotze, Harry E. Dyte, Santanu Manna +3
Magnetic noise of atomic nuclear spins is a major problem for solid state spin qubits. Highly-polarized nuclei would not only overcome this obstacle, but also make nuclear spins a…
Beyond the four-level model: Dark and hot states in quantum dots degrade photonic entanglement
Barbara Ursula Lehner, Tim Seidelmann, Gabriel Undeutsch +9
Entangled photon pairs are essential for a multitude of photonic quantum applications. To date, the best performing solid-state quantum emitters of entangled photons are semiconduc…
A source of entangled photons based on a cavity-enhanced and strain-tuned GaAs quantum dot
Michele B. Rota, Tobias M. Krieger, Quirin Buchinger +21
A quantum-light source that delivers photons with a high brightness and a high degree of entanglement is fundamental for the development of efficient entanglement-based quantum-key…
Nuclear spin diffusion in the central spin system of a GaAs/AlGaAs quantum dot
Peter Millington-Hotze, Santanu Manna, Saimon F. Covre da Silva +2
The spin diffusion concept provides a classical description of a purely quantum-mechanical evolution in inhomogeneously polarized many-body systems such as nuclear spin lattices. T…
Ideal refocusing of an optically active spin qubit under strong hyperfine interactions
Leon Zaporski, Noah Shofer, Jonathan H. Bodey +15
Combining highly coherent spin control with efficient light-matter coupling offers great opportunities for quantum communication and networks, as well as quantum computing. Optical…
Fast and efficient demultiplexing of single photons from a quantum dot with resonantly enhanced electro-optic modulators
Julian Münzberg, Franz Draxl, Saimon Filipe Covre da Silva +5
We report on a multi-photon source based on active demultiplexing of single photons emitted from a resonantly excited GaAs quantum dot. Active temporal-to-spatial mode demultipexin…
Surface passivation and oxide encapsulation to improve optical properties of a single GaAs quantum dot close to the surface
Santanu Manna, Huiying Huang, Saimon Filipe Covre da Silva +6
Epitaxial GaAs quantum dots grown by droplet etching have recently shown excellent properties as sources of single photons as well as entangled photon pairs. Integration in some na…
GaAs quantum dots grown by droplet etching epitaxy as quantum light sources
Saimon Filipe Covre da Silva, Gabriel Undeutsch, Barbara Lehner +6
This paper presents an overview and perspectives on the epitaxial growth and optical properties of GaAs quantum dots obtained with the droplet etching method as high-quality source…
Entanglement-based quantum key distribution with a blinking-free quantum dot operated at a temperature up to 20 K
Christian Schimpf, Santanu Manna, Saimon F. Covre Da Silva +2
Entanglement-based quantum key distribution promises enhanced robustness against eavesdropping and compatibility with future quantum networks. Among other sources, semiconductor qu…
Electric field induced tuning of electronic correlation in weakly confining quantum dots
Huiying Huang, Diana Csontosová, Santanu Manna +4
We conduct a combined experimental and theoretical study of the quantum-confined Stark effect in GaAs/AlGaAs quantum dots obtained with the local droplet etching method. In the exp…
Quantum cryptography with highly entangled photons from semiconductor quantum dots
Christian Schimpf, Marcus Reindl, Daniel Huber +6
State-of-the-art quantum key distribution systems are based on the BB84 protocol and single photons generated by lasers. These implementations suffer from range limitations and sec…