Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 46: Quantum dots and wires: Optical properties III

HL 46.7: Talk

Thursday, March 15, 2018, 16:45–17:00, A 151

Quantum dots for silicon photonics: A new approach of telecom light for sensing applications — •Norbert Witz, Fabian Olbrich, Sascha Kolatschek, Simone Luca Portalupi, Michael Jetter, and Peter Michler — Institut für Halbleiteroptik und funktionelle Grenzflächen (IHFG), Research Centers SCoPE and IQST, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany

Almost 100 years after the formulation of quantum mechanics, physicists face the challenge of finding possible utilizations of the theory. Beside the most prominent applications, quantum-cryptography and quantum-computing, a different class has emerged in the recent years, which employs quantum mechanical states for sensing. As shown in theory and first experiments, quantum sensing can beat the classical counterpart in terms of sensitivity and facilitate precise measurements of various physical quantities beyond the shot noise limit. The highly developed silicon platform, which has been utilised extensively for classical sensing on biological and chemical systems is also a promising candidate for quantum sensing. Therefore, non-classical light from semiconductor quantum dots grown by metal organic vapour phase epitaxy (MOVPE) with emission wavelength in the telecom bands will be sent by direct fiber-chip coupling to a photonic integrated circuit, implemented on the silicon platform. Single photons from a quantum dot will be funneled into different waveguide-based structures, with the perspective of realizing quantum sensing on chip.