Quantum Electrometry in for next-generation telecom

The terahertz band (100 GHz to 10 THz) lies in-between the frequency range of traditional electronics and optics. This band will form the basis for future 6G communications and is currently getting prominence in trace molecular sensing due to the existence of unique terahertz fingerprints of molecules and the non-invasive, non-ionising nature of terahertz radiation. A key limitation in terahertz-based telecom and spectroscopy systems is the lack of efficient room-temperature detectors in the terahertz band.

In this project you will develop a novel room-temperature detector of terahertz radiation with a quantum efficiency in the order of unity - the theoretical limit - which is also completely immune to all backgrounds. The quantum sensor will trap terahertz radiation in a whispering gallery mode resonator that contains an atomic medium where a nonlinear optical process efficiently converts terahertz signals to optical light. The converted optical light is then detected with conventional optical photodetectors, which have near-unity efficiency. You will build the device, and test and model its functionalities.

The ideal candidate must have the following qualities.

• A good first degree in Physics or in a related area, completed or close to completion.

• Knack for experimental physics and engineering with some hands-on expertise in optics and electronics.

• A good understanding of electromagnetism and quantum mechanics.

• Strong interests in current quantum technologies and telecommunications.

• Good programming knowledge (python preferred)

• Diligence, conscientiousness, and strong work ethic.

• Good interpersonal skills.

For more information about studying for a PhD at the University of Birmingham, the full range of the research undertaken in the School of Physics and Astronomy, the funding opportunities available and guidance on making your application, visit our website https://www.birmingham.ac.uk/schools/physics/phd/phd.aspx.

The School of Physics and Astronomy is an Institute of Physics Juno Champion since 2014 and holder of the Athena SWAN Silver Award. Both initiatives recognise the School’s commitment to promote diversity and equality, and to encourage better practice for all members of the community, whilst also working towards developing an equitable working culture in which all students and staff can achieve their full potential. We welcome applications from all qualified applicants, and encourage applications from traditionally under-represented groups in Physics and Astronomy including, but not limited to, women and Black, Asian and Minority Ethnicity.