We are a collaborative community of researchers interested in the development, study and exploitation of quantum phenomena, nanostructured materials and nanoscale devices.

Quantum Transport

We study quantum devices through low-temperature electronic transport measurements. Our goal is control at the level of single charge, single flux quantum, single photon and single phonon, enabled by fundamental physical phenomena such as superconductivity, the Josephson effect, flux and charge quantisation, and quantum entanglement. The ability to control and measure quantum states in nanoscale solid-state devices makes them a promising platform for new quantum technologies. Applications include quantum computing and quantum simulation, quantum encryption, quantum metrology, and novel sensors operating beyond the standard quantum limit.

Work within this activity includes:

  • Quantum Metrology: superconducting and hybrid charge pumps for accurate definitions of the ampere.
  • Graphene & 2D materials: transport phenomena in 2D materials including hydrodynamic flow and the superconducting proximity effect.
  • Ultralow temperature thermometry and devices: developing the techniques required to undertake quantum transport measurements at electron temperatures below 1 millikelvin.
  • Semiconductors: Transport properties of narrow band-gap semiconductor heterostructures and nanostructures
  • Nanoelectromechanics: using nanoscale cantilevers to probe properties of quantum fluids.

Group Members

  • Professor Yuri Pashkin
  • Professor Rich Haley
  • Professor Manus Hayne
  • Dr Sergey Kafanov
  • Dr Leonid Ponomarenko
  • Dr Jon Prance
  • Dr Viktor Tsepelin

Semiconductor Nanostructures and Quantum Devices

Research involves the design, fabrication and characterisation of novel quantum devices that exploit the properties of III-V compound semiconductor nanostructures such as quantum dots, nanowires, quantum wells and superlattices.

A key aspect of our research is the use of advanced epitaxial growth including:

  • narrow band-gap semiconductors, such as GaSb, InAs and InSb
  • self-assembled and site-controlled nanostructures
  • droplet epitaxy
  • hydrogenation of semiconductors
  • dilute nitrides
  • mismatched materials with atomically abrupt interfaces on GaAs and silicon substrates

We are developing a variety of photonic and electronic devices including:

  • mid-infrared LEDs and lasers for environmental gas sensing
  • solar cells and thermo-photovoltaic devices for renewable energy generation
  • GaSb quantum ring lasers for telecommunications
  • low noise photodetectors for focal plane arrays and thermal imaging
  • low-voltage non-volatile memories.

Our research is frequently carried out in collaboration with industry partners including IQE, CST, Amethyst, SELEX, Huawei and others, as well as many academic groups worldwide.

Group Members

  • Professor Tony Krier
  • Professor Manus Hayne
  • Professor Robert Young
  • Dr Andrew Marshall
  • Dr Qian Zhuang

Nanostructured Materials and Surfaces

We explore physical phenomena in advanced materials at the micron, nano and atomic scale. Our activities range from the development of functional ‘smart’ surfaces realised via novel molecular self-assembly methods to nanoscale device characterisation, atomic resolution imaging, instrument development and biomaterial analysis. 

We develop new materials with targeted chemical, electrical, thermal and catalytic properties such as self-assembled molecular networks and novel 2D material – organic film heterostructures fabricated using a wide range of atomically precise molecular assembly techniques and spanning environments from highly controlled ultra-high vacuum conditions to liquid-phase molecular self-assembly and Langmuir-Blodgett deposition.

Underpinning this research are a wide range of characterisation methods and a long-standing interest in novel instrument development.  Scanning probe microscopy (SPM) is unparalleled in its ability to provide spatial resolution at the atomic and nanoscale. Our suite of SPM instruments are dedicated to high-resolution imaging, nanomechanical mapping, electrical measurement and scanning thermal microscopy, which we combine with optical spectroscopy, high-speed interferometry, x-ray photoelectron spectroscopy, synchrotron radiation studies and electronic structure calculation providing access to the full spectrum of materials properties. 

Group Members

  • Professor Oleg Kolosov
  • Dr Sam Jarvis
  • Dr Benjamin Robinson

Quantum Security

Our research straddles three main disciplines: material science, quantum optics and information security. Through the hybridisation of these fields, we are driving a unique research activity; investigating the application of light-matter interfaces in low-dimensional structures for physical security applications. Research is divided into the following themes:

  1. Developing components for optical quantum information processing (QIP) using low-dimensional semiconductor structures. The scalability and low-cost of semiconductor systems make them ideal for producing scalable quantum technologies.
  2. Harnessing the unique properties of nanostructures embedded in devices for identity provision and authentication. At the atomic level, no two objects are identical. We're developing technologies that produce east-to-read signatures based on this uniqueness, for security applications.
  3. Quantum light emission from heterostructures of two-dimensional materials, and associated applications. Solid-state lighting and two-dimensional materials were both the subject of recent Nobel prizes in physics. The combination of the two is driving an exciting research field.

Group Members

  • Professor Robert Young
  • Professor Manus Hayne
  • Dr Benjamin Robinson