Research Data Leeds Repository

Dataset relating to 'Apertureless near-field terahertz imaging using the self-mixing effect in a quantum cascade laser'

Dean, Paul and Mitrofanov, Oleg and Keeley, James and Kundu, Iman and Li, Lianhe and Linfield, Edmund and Davies, A Giles (2015) Dataset relating to 'Apertureless near-field terahertz imaging using the self-mixing effect in a quantum cascade laser'. University of Leeds. [Dataset] https://doi.org/10.5518/20

Dataset description

This dataset relates to data presented in the work, 'Apertureless near-field terahertz imaging using the self-mixing effect in a quantum cascade laser'. In this work we report two-dimensional apertureless near-field terahertz (THz) imaging using a quantum cascade laser (QCL) source and scattering probe, and demonstrate a resolution of ~1 μm (~λ/100), which represents the highest value achieved to date with a THz QCL. By employing a detection scheme based on self-mixing interferometry, our approach offers experimental simplicity by removing the need for an external detector, and also provides sensitivity to the phase of the reinjected field. We demonstrate a near-field enhancement of the scattered field amplitude for small probe-sample separations, and investigate how the phase of the reinjected field varies with the round-trip time in the external cavity.

Keywords:	terahertz imaging, quantum cascade laser, near-field imaging
Subjects:	F000 - Physical sciences > F300 - Physics > F310 - Applied physics F000 - Physical sciences > F300 - Physics > F360 - Optical physics > F361 - Laser physics
Divisions:	Faculty of Engineering > School of Electronic and Electrical Engineering
Related resources:	Location Type http://dx.doi.org/10.1063/1.4943088 Publication http://eprints.whiterose.ac.uk/96091/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	17 Nov 2015 16:29
URI:	http://archive.researchdata.leeds.ac.uk/id/eprint/17
Additional details Additional details Creators: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Dean, Paul Mitrofanov, Oleg Keeley, James Kundu, Iman Li, Lianhe Linfield, Edmund https://orcid.org/0000-0001-6912-0535 Davies, A Giles https://orcid.org/0000-0002-1987-4846 Type of data: Dataset Research funders: EPSRC, EPSRC, Royal Society, Royal Society Grant numbers: EP/J017671/1, EP/J002356/1, UF130493, Royal Society Wolfson Research Merit Award Publication date: 2015 Resource language: English Metadata language: English Publisher: University of Leeds Contact Email Address: P.Dean@leeds.ac.uk Last Modified: 07 Mar 2017 11:55

Files

Documentation

Summary [1kB] Summary [1kB] Summary [1kB] Visible to: Anyone File name: summary.txt Content type: Documentation Description: Summary and explaination of data files Mime-Type: text/plain File size: 1kB

Data

Data relating to Fig.2 [18kB] Data relating to Fig.2 [18kB] Data relating to Fig.2 [18kB] Visible to: Anyone File name: Fig2.xlsx Content type: Data Description: Self-mixing voltage VSM recorded as a function of tip-sample separation d, with the needle tip modulated at 90 Hz with amplitude ~1 μm. Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet File size: 18kB

Data relating to Fig.3 [20kB] Data relating to Fig.3 [20kB] Data relating to Fig.3 [20kB] Visible to: Anyone File name: Fig3.xlsx Content type: Data Description: Self-mixing voltage VSM recorded as a function of tip-sample separation d, for different positions of the needle tip in the beam focus. Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet File size: 20kB

Data relating to Fig.4a [124kB] Data relating to Fig.4a [124kB] Data relating to Fig.4a [124kB] Visible to: Anyone File name: Fig4a.xlsx Content type: Data Description: Two-dimensional near-field image of the corner of a rectangular region of 115 nm-thick gold deposited on a quartz substrate. Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet File size: 124kB

Data relating to Fig.4b [15kB] Data relating to Fig.4b [15kB] Data relating to Fig.4b [15kB] Visible to: Anyone File name: Fig4b.xlsx Content type: Data Description: Image data for obtaining the ERFs along x and y directions Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet File size: 15kB

Data relating to Fig.4c [17kB] Data relating to Fig.4c [17kB] Data relating to Fig.4c [17kB] Visible to: Anyone File name: Fig4c.xlsx Content type: Data Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet File size: 17kB