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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
michael.johnston@physics.ox.ac.uk
Johnston Group Website
  • About
  • Publications

The Importance of Interface Morphology for Hysteresis-Free Perovskite Solar Cells

Fundacio Scito (2017)

Authors:

Jay Patel, Jennifer Wong-Leung, Stephan Van Reenen, Nobuya Sakai, Jacob Wang, Elizabeth Parrott, Mingzhen Liu, Henry Snaith, Laura Herz, Michael Johnston
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Modulation of terahertz polarization on picosecond timescales using polymer-encapsulated semiconductor nanowires

Conference on Lasers and Electro-Optics (CLEO 2017) Optical Society of America 2017-January (2017) 1-2

Authors:

Jessica Boland, Djamshid Damry, HH Tan, C Jagadish, HJ Joyce, Michael Johnston

Abstract:

We exploit the photoconductivity of semiconductor nanowires to achieve ultrafast broad-bandwidth modulation of THz pulses. A modulation depth of -8 dB was exhibited by a polarizer consisting of 14 layers of nanowires encapsulated in polymer.
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Modulation of terahertz polarization on picosecond timescales using polymer-encapsulated semiconductor nanowires

2017 Conference on Lasers and Electro Optics CLEO 2017 Proceedings 2017-January (2017) 1-2

Authors:

SA Baig, JL Boland, DA Damry, H Hoe Tan, C Jagadish, HJ Joyce, MB Johnston

Abstract:

We exploit the photoconductivity of semiconductor nanowires to achieve ultrafast broad-bandwidth modulation of THz pulses. A modulation depth of -8 dB was exhibited by a polarizer consisting of 14 layers of nanowires encapsulated in polymer.

THz modulators and detectors based on semiconductor nanowires

2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) IEEE (2017)

Abstract:

Semiconductors nanowires have to potential to be building blocks for future nano-optoelectronic devices. We have recently demonstrated high performance THz photonic devices based on GaAs and InP nanowires. These include ultrafast optically switched modulators of THz radiation and single nanowire photoconductive detectors of THz pulses.
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Near-Infrared and Short-Wavelength Infrared Photodiodes Based on Dye-Perovskite Composites

ADVANCED FUNCTIONAL MATERIALS 27:38 (2017) ARTN 1702485

Authors:

Q Lin, Z Wang, M Young, JB Patel, RL Milot, LM Maestro, RR Lunt, HJ Snaith, MB Johnston, LM Herz
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