Skip to main content
Home
Department Of Physics text logo
  • Research
    • Our research
    • Our research groups
    • Our research in action
    • Research funding support
    • Summer internships for undergraduates
  • Study
    • Undergraduates
    • Postgraduates
  • Engage
    • For alumni
    • For business
    • For schools
    • For the public
Menu
Representation of THz spectroscopy of a metamaterial with a Nanowire THz sensor

Representation of THz spectroscopy of a metamaterial with a Nanowire THz sensor

Credit: Rendering by Dimitars Jevtics

Prof Michael Johnston

Professor of Physics

Research theme

  • Photovoltaics and nanoscience

Sub department

  • Condensed Matter Physics

Research groups

  • Terahertz photonics
  • Advanced Device Concepts for Next-Generation Photovoltaics
michael.johnston@physics.ox.ac.uk
Johnston Group Website
  • About
  • Publications

Methylammonium-free wide-bandgap metal halide perovskites for tandem photovoltaics

Nature Reviews Materials Springer Nature 8:12 (2023) 822-838

Authors:

Alexandra J Ramadan, Robert DJ Oliver, Michael B Johnston, Henry J Snaith
More details from the publisher
More details

Correction to "A Templating Approach to Controlling the Growth of Coevaporated Halide Perovskites".

ACS energy letters 8:11 (2023) 4714-4715

Authors:

Siyu Yan, Jay B Patel, Jae Eun Lee, Karim A Elmestekawy, Sinclair R Ratnasingham, Qimu Yuan, Laura M Herz, Nakita K Noel, Michael B Johnston

Abstract:

[This corrects the article DOI: 10.1021/acsenergylett.3c01368.].
More details from the publisher
More details
More details

Terahertz characterization of charge carrier dynamics in 3D Dirac semi-metal Cd3As2 nanowires

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) IEEE (2023) 1-2

Authors:

Y Saboon, D Damry, CQ Xia, P Schoenherr, X Liu, Thorsten Hesjedal, Laura M Herz, Michael B Johnston, JL Boland

Abstract:

Optical Pump Terahertz Probe (OPTP) spectroscopy is a well-established measurement technique with which charge-carrier dynamics of semiconductor nanowires (NW) can be extracted in a noncontact manner. Here in this work, we employ OPTP spectroscopy for measuring temperature-dependent photoconductivity spectra of 3D Dirac Cd 3 As 2 semi-metal nanowires, revealing a high Extrinsic carrier concentration of ∼2.0x1017cm−3 and ultrahigh carrier mobility of up to ∼13x103cm2V−1s−1 at a temperature of 5 K.
More details from the publisher
Details from ORA
More details

Topological materials for helicity-dependent THz emission

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) IEEE (2023) 1-2

Authors:

A Mannan, Y Saboon, CQ Xia, DA Damry, P Schoenherr, Dharmalingam Prabhakaran, Laura M Herz, Thorsten Hesjedal, Michael B Johnston, Jl Boland

Abstract:

Topological insulator (TI) materials are emerging as novel materials for spintronic applications. Here, we demonstrate helicity-dependent THz emission from Dirac semi-metal Cd 3 As 2 nanowires and used scattering-type scanning optical microscopy (s-SNOM) to identify potential single nanowire candidates for device applications. The preliminary investigation data of a candidate nanowire shows a homogenous topography and constant dielectric function in the MIR range. Indicating high-quality crystalline growth ideal for topological characterization.
More details from the publisher
Details from ORA
More details

Roadmap on Photovoltaic Absorber Materials for Sustainable Energy Conversion

(2023)

Authors:

James C Blakesley, Ruy S Bonilla, Marina Freitag, Alex M Ganose, Nicola Gasparini, Pascal Kaienburg, George Koutsourakis, Jonathan D Major, Jenny Nelson, Nakita K Noel, Bart Roose, Jae Sung Yun, Simon Aliwell, Pietro P Altermatt, Tayebeh Ameri, Virgil Andrei, Ardalan Armin, Diego Bagnis, Jenny Baker, Hamish Beath, Mathieu Bellanger, Philippe Berrouard, Jochen Blumberger, Stuart A Boden, Hugo Bronstein, Matthew J Carnie, Chris Case, Fernando A Castro, Yi-Ming Chang, Elmer Chao, Tracey M Clarke, Graeme Cooke, Pablo Docampo, Ken Durose, James R Durrant, Marina R Filip, Richard H Friend, Jarvist M Frost, Elizabeth A Gibson, Alexander J Gillett, Pooja Goddard, Severin N Habisreutinger, Martin Heeney, Arthur D Hendsbee, Louise C Hirst, M Saiful Islam, KDG Imalka Jayawardena, Michael B Johnston, Matthias Kauer, Jeff Kettle, Ji-Seon Kim, Dan Lamb, David Lidzey, Jihoo Lim, Roderick MacKenzie, Nigel Mason, Iain McCulloch, Keith P McKenna, Sebastian B Meier, Paul Meredith, Graham Morse, John D Murphy, Chris Nicklin, Paloma Ortega-Arriaga, Thomas Osterberg, Jay B Patel, Anthony Peaker, Moritz Riede, Martyn Rush, James W Ryan, David O Scanlon, Peter J Skabara, Franky So, Henry J Snaith, Ludmilla Steier, Jarla Thiesbrummel, Alessandro Troisi, Craig Underwood, Karsten Walzer, Trystan Watson, J Michael Walls, Aron Walsh, Lucy D Whalley, Benedict Winchester, Samuel D Stranks, Robert LZ Hoye
More details from the publisher
Details from ArXiV

Pagination

  • First page First
  • Previous page Prev
  • …
  • Page 2
  • Page 3
  • Page 4
  • Page 5
  • Current page 6
  • Page 7
  • Page 8
  • Page 9
  • Page 10
  • …
  • Next page Next
  • Last page Last

Footer Menu

  • Contact us
  • Giving to the Dept of Physics
  • Work with us
  • Media

User account menu

  • Log in

Follow us

FIND US

Clarendon Laboratory,

Parks Road,

Oxford,

OX1 3PU

CONTACT US

Tel: +44(0)1865272200

University of Oxfrod logo Department Of Physics text logo
IOP Juno Champion logo Athena Swan Silver Award logo

© University of Oxford - Department of Physics

Cookies | Privacy policy | Accessibility statement

Built by: Versantus

  • Home
  • Research
  • Study
  • Engage
  • Our people
  • News & Comment
  • Events
  • Our facilities & services
  • About us
  • Current students
  • Staff intranet