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Terahertz photoconductance dynamics of semiconductors from sub-nanosecond to millisecond timescales
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Butler-Caddle, Edward, Grant, Nicholas E., Pain, Sophie L., Murphy, John D., Jayawardena, K. D. G. Imalka and Lloyd-Hughes, James (2023) Terahertz photoconductance dynamics of semiconductors from sub-nanosecond to millisecond timescales. Applied Physics Letters, 122 (1). 012101. doi:10.1063/5.0130721 ISSN 0003-6951.
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WRAP-Terahertz-photoconductance-dynamics-of-semiconductors-from-sub-nanosecond-to-millisecond-timescales-Lloyd-Hughes-2023.pdf - Published Version Embargoed item. Restricted access to Repository staff only until 3 January 2024. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (2165Kb) |
Official URL: http://dx.doi.org/10.1063/5.0130721
Abstract
Optical pump terahertz probe spectroscopy (OPTP) is a versatile non-contact technique that measures transient photoconductance decays with femtosecond temporal resolution. However, its maximum temporal range is limited to only a few nanoseconds by the mechanical delay lines used. We extended the temporal range of OPTP to milliseconds and longer while retaining sub-nanosecond resolution. A separate pump laser was electrically synchronized to the probe pulses, allowing the pump–probe delay to be controlled with an electronic delay generator. We demonstrated the capabilities of this technique by examining the photoconductance decays of semiconductors with lifetimes ranging over six orders of magnitude: III-Vs, metal halide perovskites, germanium, and silicon. A direct comparison of results on silicon from OPTP and inductively coupled photoconductance decay highlighted the higher spatial and temporal resolution of OPTP, which allowed in-plane and out-of-plane carrier diffusion to be studied.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QC Physics | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics |
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| Library of Congress Subject Headings (LCSH): | Terahertz spectroscopy, Photoconductivity, Optical measurements, Semiconductors | |||||||||
| Journal or Publication Title: | Applied Physics Letters | |||||||||
| Publisher: | American Institute of Physics | |||||||||
| ISSN: | 0003-6951 | |||||||||
| Official Date: | 3 January 2023 | |||||||||
| Dates: |
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| Volume: | 122 | |||||||||
| Number: | 1 | |||||||||
| Number of Pages: | 6 | |||||||||
| Article Number: | 012101 | |||||||||
| DOI: | 10.1063/5.0130721 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Reuse Statement (publisher, data, author rights): | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Edward Butler-Caddle, Nicholas E. Grant, Sophie L. Pain, John D. Murphy, K. D. G. Imalka Jayawardena, and James Lloyd-Hughes , "Terahertz photoconductance dynamics of semiconductors from sub-nanosecond to millisecond timescales", Appl. Phys. Lett. 122, 012101 (2023) https://doi.org/10.1063/5.0130721 and may be found at https://doi.org/10.1063/5.0130721. | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 9 January 2023 | |||||||||
| RIOXX Funder/Project Grant: |
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