Research Data Leeds Repository

Citation

Rubino, Pierluigi and Keeley, James and Sulollari, Nikollao and Burnett, Andrew and Valavanis, Alexander and Kundu, Iman and Rosamond, Mark C. and Li, Lianhe and Linfield, Edmund and Davies, A. Giles and Cunningham, John and Dean, Paul (2021) Dataset associated with "All-electronic phase-resolved THz microscopy using the self-mixing effect in a semiconductor laser". University of Leeds. [Dataset] https://doi.org/10.5518/977

Dataset description

This dataset relates to data presented in the work, "All-electronic phase-resolved THz microscopy using the self-mixing effect in a semiconductor laser". In this work we report all-electronic coherent scattering-type scanning near-field microscopy (s-SNOM) using a terahertz-frequency quantum cascade laser. By exploiting the coherent self-mixing effect in these lasers, in conjunction with electronic frequency tuning of the laser, we demonstrate spatial mapping of both the amplitude and phase of the scattered field with deeply sub-wavelength resolution. We apply our technique for coherent microscopy of a phonon-resonant crystal. The extracted amplitude and phase parameters reveal clear contrast when compared to both metallic and non-resonant dielectric materials, and show excellent agreement with those calculated using a finite-dipole model of the near-field interaction between the s-SNOM tip and the resonant sample in the Reststrahlen band.

Keywords:	terahertz, scattering-type, Scanning Near-Field Microscopy, coherent imaging, quantum cascade lasers, self-mixing
Subjects:	F000 - Physical sciences > F300 - Physics > F310 - Applied physics F000 - Physical sciences > F300 - Physics > F360 - Optical physics > F361 - Laser physics
Divisions:	Faculty of Engineering and Physical Sciences > School of Electronic and Electrical Engineering
Related resources:	Location Type https://doi.org/10.1021/acsphotonics.0c01908 Publication https://eprints.whiterose.ac.uk/172331/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	29 Apr 2021 14:48
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/835
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Rubino, Pierluigi https://orcid.org/0000-0001-8669-6747 University of Leeds https://ror.org/024mrxd33 ror Keeley, James https://orcid.org/0000-0001-5251-6648 University of Leeds https://ror.org/024mrxd34 ror Sulollari, Nikollao https://orcid.org/0000-0003-0703-1603 University of Leeds https://ror.org/024mrxd35 ror Burnett, Andrew https://orcid.org/0000-0003-2175-1893 University of Leeds https://ror.org/024mrxd36 ror Valavanis, Alexander https://orcid.org/0000-0001-5565-0463 University of Leeds https://ror.org/024mrxd37 ror Kundu, Iman https://orcid.org/0000-0002-3564-1903 University of Leeds https://ror.org/024mrxd38 ror Rosamond, Mark C. University of Leeds https://ror.org/024mrxd39 ror Li, Lianhe https://orcid.org/0000-0003-4998-7259 University of Leeds https://ror.org/024mrxd40 ror Linfield, Edmund https://orcid.org/0000-0001-6912-0535 University of Leeds https://ror.org/024mrxd41 ror Davies, A. Giles https://orcid.org/0000-0002-1987-4846 University of Leeds https://ror.org/024mrxd42 ror Cunningham, John https://orcid.org/0000-0002-1805-9743 University of Leeds https://ror.org/024mrxd43 ror Dean, Paul https://orcid.org/0000-0002-3950-4359 University of Leeds https://ror.org/024mrxd44 ror Type of data: Dataset Research funders: EPSRC, EPSRC, Royal Society, Wolfson Foundation Grant numbers: EP/P021859/1, EP/P007449/1, UF130493 Publication date: 2021 Resource language: English Metadata language: English Publisher: University of Leeds Contact email: eenpde@leeds.ac.uk Last Modified: 03 Sep 2024 08:55

Files

Documentation

Summary [1kB] Summary [1kB] Summary [1kB] Security: Anyone File name: summary.txt Content type: Documentation Description: Summary and explaination of data files Mime-Type: text/plain License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 1kB

Data

Data relating to Fig.1b [139kB] Data relating to Fig.1b [139kB] Data relating to Fig.1b [139kB] Security: Anyone File name: Fig1b.xlsx Content type: Data Description: Emission spectra of the QCL obtained at different driving currents Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 139kB

Data relating to Fig.3 [17kB] Data relating to Fig.3 [17kB] Data relating to Fig.3 [17kB] Security: Anyone File name: Fig3.xlsx Content type: Data Description: Self-mixing voltages VSM extracted from the series of THz-s-SNOM images shown in Figure 2, for gold and SiO2 regions of the sample. Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 17kB

Data relating to Fig.4a [44kB] Data relating to Fig.4a [44kB] Data relating to Fig.4a [44kB] Security: Anyone File name: Fig4a.xlsx Content type: Data Description: Real and imaginary components of the complex permittivity of KBr determined from a single phonon oscillator model. Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 44kB

Data relating to Fig.4b [40kB] Data relating to Fig.4b [40kB] Data relating to Fig.4b [40kB] Security: Anyone File name: Fig4b.xlsx Content type: Data Description: Magnitude of the complex scattering efficiency obtained for KBr and Au using the finite dipole model Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Data relating to Fig.4c [40kB] Data relating to Fig.4c [40kB] Data relating to Fig.4c [40kB] Security: Anyone File name: Fig4c.xlsx Content type: Data Description: Phase of the complex scattering efficiency obtained for KBr and Au using the finite dipole model Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 40kB

Data relating to Fig.5 [17kB] Data relating to Fig.5 [17kB] Data relating to Fig.5 [17kB] Security: Anyone File name: Fig5.xlsx Content type: Data Description: Self-mixing voltages VSM for gold and KBr regions of the sample. Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 17kB