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Dataset for Terahertz focusing and polarization control in large-area bias-free semiconductor emitters

Dataset for Terahertz focusing and polarization control in large-area bias-free semiconductor emitters
Dataset for Terahertz focusing and polarization control in large-area bias-free semiconductor emitters
We show that, when large area multiplex terahertz semiconductor emitters that work on diffusion currents and Schottky potentials are illuminated by ultrashort optical pulses, can radiate a directional electromagnetic terahertz pulse which is controlled by the angular spectrum of the incident optical beam. Using the lens that focuses the incident near infrared pulse, we have demonstrated THz emission focusing in free space, at the same point where the optical radiation would focus. We investigated the beam waist and Gouy phase shift of the THz emission as a function of frequency. We also show that the polarization profile of the emitted THz can be tailored by the metallic patterning on the semiconductor, demonstrating radial polarization when a circular emiter design is used. Our techniques can be used for fast THz beam steering and mode control for efficiently coupling to waveguides without the need for THz lenses or parabolic mirrors.
Springer
Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
Berry, Sam
0f768f48-36c4-4599-8917-7aae657378a7
Apostolopoulos, Vasileios, Gow, Paul, Carthy, Joanna, Leigh, Berry, Sam and Mills, Benjamin (2018) Dataset for Terahertz focusing and polarization control in large-area bias-free semiconductor emitters Springer doi:10.5258/SOTON/D0289 [Dataset]

Apostolopoulos, Vasileios, Gow, Paul, Carthy, Joanna, Leigh, Berry, Sam and Mills, Benjamin (2018) Dataset for Terahertz focusing and polarization control in large-area bias-free semiconductor emitters Springer doi:10.5258/SOTON/D0289 [Dataset]

Record type: Dataset

Abstract

We show that, when large area multiplex terahertz semiconductor emitters that work on diffusion currents and Schottky potentials are illuminated by ultrashort optical pulses, can radiate a directional electromagnetic terahertz pulse which is controlled by the angular spectrum of the incident optical beam. Using the lens that focuses the incident near infrared pulse, we have demonstrated THz emission focusing in free space, at the same point where the optical radiation would focus. We investigated the beam waist and Gouy phase shift of the THz emission as a function of frequency. We also show that the polarization profile of the emitted THz can be tailored by the metallic patterning on the semiconductor, demonstrating radial polarization when a circular emiter design is used. Our techniques can be used for fast THz beam steering and mode control for efficiently coupling to waveguides without the need for THz lenses or parabolic mirrors.

Archive Data_for_publication.zip - Dataset
Restricted to System admin until 1 January 2018.
Available under License Creative Commons Attribution.

More information

Published date: 1 January 2018
Organisations: Quantum, Light & Matter Group, ORC Research, Physics & Astronomy, Optoelectronics Research Centre, Structure & Materials Group

Identifiers

Local EPrints ID: 415387
URI: http://eprints.soton.ac.uk/id/eprint/415387
PURE UUID: fa40a010-233d-4d60-bdb0-743b4b02995d
ORCID for Paul Gow: ORCID iD orcid.org/0000-0002-3247-9082
ORCID for Sam Berry: ORCID iD orcid.org/0000-0002-9538-8655
ORCID for Benjamin Mills: ORCID iD orcid.org/0000-0002-1784-1012

Catalogue record

Date deposited: 08 Nov 2017 17:31
Last modified: 09 Nov 2017 17:31

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Contributors

Creator: Vasileios Apostolopoulos
Data Collector: Paul Gow ORCID iD
Data Collector: Joanna, Leigh Carthy
Editor: Sam Berry ORCID iD
Data Manager: Benjamin Mills ORCID iD

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