Quantum Control of Emission in Valleytronic Materials

Official occupation: ph.d., naturvidenskab og teknik. Employment conditions: Almindelige vilkår. Employer CVR: 31119103.

Primary career market

Public Sector, Education & Impact (employer-sector evidence). Applications are invited for a PhD fellowship/scholarship at Graduate School of Natural Sciences, Aarhus University, Denmark, within the Physics and Astronomy programme. The position is available from February 2027 or later. Research area and project description:

• We are seeking a candidate for a fully funded 3-year PhD project at the Department of Physics and Astronomy, Aarhus University, in the new group of Asst.
• Prof.
• Christian Frydendahl, as part of a DFF Sapere Aude research grant.
• Compact, integrable sources of circularly polarized light (CPL) are a key enabling technology for chip-scale quantum technologies, but electrically driven sources of pure CPL do not yet exist.
• Monolayer transition metal dichalcogenides (TMDCs) emit left- or right-handed CPL depending on which band structure valley, K or K', an electron-hole pair recombines in.
• Ordinarily, this occurs with an equal 50/50 split between the two valleys.

This project aims to build a new light-emitting diode geometry in which the Valley Hall effect, another intrinsic property of these materials, filters the valley index of the charge carriers during transport, enabling a purely electrically pumped source of CPL1 …