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JT Janssen

JT Janssen

Chief Scientist

Dr Jan-Theodoor (JT) Janssen joined NPL in 1998. Prior to this he was a research fellow at the University of Bristol and did his PhD and Masters at the University of Nijmegen in the Netherlands. JT became an NPL Fellow in Quantum Electrical Metrology in 2006 and was appointed a visiting professor at Lancaster University in 2018.

Since 2017, he has been a member of the NPL Executive team, first as the Research Director, and recently as the Chief Scientist. In this role he is responsible for the external scientific engagements with academia and other government organisations. Internally, he is responsible for the quality and benchmarking of the research outputs of the laboratory and its knowledge management. JT is also the UK delegate for EURAMET the European Association of National Metrology Institutes. JT is the executive sponsor for NPL’s Juno committee, which aims to address gender equality in physics and to encourage better practice for all staff.

In 2015, JT launched and now heads the National Graphene Metrology Centre (NGMC), whose role it is to develop metrology and standardisation for the nascent graphene industry. JT is also a Scientific Co-Director of the Quantum Metrology Institute (QMI), which covers all of NPL's leading-edge quantum science and metrology research and provides the expertise and facilities needed for academia and industry to test, validate and ultimately commercialise new quantum research and technologies.

Areas of interest

At NPL, his research has involved a wide range of topics in solid-state physics applied to electrical metrology. Key topics are: the behaviour and transport of electrons in nanostructured devices with the aim of developing a quantum standard for electrical current; the quantum Hall effect in both traditional semiconductor systems, as well as graphene, as a primary standard for resistance; and the Josephson effect for a quantum voltage standard. JT has also done extensive research in the properties of low-dimensional systems such as graphene and other 2D materials. He has co-authored more 100 scientific publications on these topics.

JT is a Chartered Physicist and a Fellow of NPL, the Institute of Physics (IOP) and the Institute of Engineering and Technology (IET). He is also the NPL Head of Science and Engineering Profession for the Government Science and Engineering Profession (GSE).

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