Current Interests

John is currently researching developments in nanoscience, including:

• transport properties of graphene and carbon nanotubes
• single particle measurements with nanoSQUID
• sub-micron Hall sensors
• the metrology of nanoelectromechanical (NEMS) resonators.

Biography

John joined NPL in 1969 following a D.Phil. in ultra-low temperature physics at Oxford University. He worked on metrology applications of macroscopic quantum aspects of superconductivity (involving fundamental constant determinations, SQUIDs and high frequency applications) for a number of years.

Later he spent more than a decade on research into the applications of high temperature superconductivity.

He is an emeritus senior NPL fellow, has written over 200 papers and was head of the Quantum Detection Group until retirement in 2003. John is also a visiting professor at Imperial College and a Fellow of the Institute of Physics.

Recent Publications

Optimization of 2DEG InAs/GaSb Hall Sensors for Single Particle Detection
O. Kazakova, J. C. Gallop, D. C. Cox, E. Brown, A. Cuenat, and K. Suzuki
IEEE Trans. Mag. 44, pages 4480-3 (2008)

Characteristics of focused ion beam nanoscale Josephson devices
L. Hao, D. C. Cox and J. C. Gallop
SUST 22, 064011 (2009)

Fundamental metrology in the future: Measuring the single quantum
J. C. Gallop
Eu. Phys. Jnl. (Special Topics), 172, pages 399-408 (2009)

Focused Ion Beam NanoSQUIDs as Novel NEMS Resonator Readouts
L. Hao, J. C. Gallop, D. Cox, E. J. Romans, J. C. Macfarlane, and J. Chen
IEEE Trans. Appl. Supercon. 19, pages 639-42 (2009)

Towards a metrological determination of the performance of SERS media
R. C. Maher, T. Zhang, L. F. Cohen, J. C. Gallop, F. M. Liu and M. Green
Phys. Chem. Chem. Phys. (2009)

Excitation, detection, and passive cooling of a micromechanical cantilever using near-field of a microwave resonator
L. Hao, J. C. Gallop, D. Cox
Appl. Phys. Lett., 95, 113501 (2009)

Detection of a micron-sized magnetic particle using InSb Hall sensor
O. Kazakova, J. C. Gallop, P. See, D. Cox, G. K. Perkins, J. D. Moore, and L. F. Cohen
IEEE Trans. Magnetics 45, pages 4499-502 (2009)

Ultrasmall particle detection using a submicron Hall sensor
O. Kazakova, V. Panchal, J. Gallop, P. See, D. C. Cox, M. Spasova, and L. F. Cohen
J. Appl. Phys. 107, 09E708 (2010)

Magnetic nanoparticle detection using nano-SQUID sensors
L. Hao, D. Cox, P. See, J. Gallop and O. Kazakova
J. Phys. D 43, 474004 (2010)
doi: 10.1088/0022-3727/43/47/474004

Design concept for a novel SQUID based microdosimeter
S. Galer, L. Hao, J. Gallop, H. Palmans, K. Kirkby and A. Nisbet
MICROS 2009 Symposium Proceedings (special issue of Radiation Protection Dosimetry: Oxford Journals, Oxford University Press, 2010)

Contact details

E-mail: john.gallop@npl.co.uk
Tel: 0208 943 6585