Optical pump rectification emission: route to terahertz free-standing surface potential diagnostics

Peters, L, Tunesi, J, Pasquazi, A and Peccianti, M (2017) Optical pump rectification emission: route to terahertz free-standing surface potential diagnostics. Scientific Reports, 7. p. 9805. ISSN 2045-2322

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Abstract

We introduce a method for diagnosing the electric surface potential of a semiconductor based on THz surface generation. In our scheme, that we name Optical Pump Rectification Emission, a THz field is generated directly on the surface via surface optical rectification of an ultrashort pulse after which the DC surface potential is screened with a second optical pump pulse. As the THz generation directly relates to the surface potential arising from the surface states, we can then observe the temporal dynamics of the static surface field induced by the screening effect of the photo-carriers. Such an approach is potentially insensitive to bulk carrier dynamics and does not require special illumination geometries.

Item Type: Article
Keywords: Ultrafast Photonics, Terahertz, Surface Physics, Nonlinear Optics
Schools and Departments: School of Mathematical and Physical Sciences > Mathematics
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Sussex Centre for Quantum Technologies
Subjects: Q Science > QC Physics > QC0170 Atomic physics. Constitution and properties of matter Including molecular physics, relativity, quantum theory, and solid state physics
Q Science > QC Physics > QC0350 Optics. Light
Q Science > QC Physics > QC0501 Electricity and magnetism > QC0522 Electricity > QC0680 Quantum electrodynamics
T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Photonics
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Depositing User: Marco Peccianti
Date Deposited: 31 Aug 2017 13:57
Last Modified: 18 Oct 2017 13:34
URI: http://sro.sussex.ac.uk/id/eprint/69957

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Project NameSussex Project NumberFunderFunder Ref
Route to guided TeraHertz backscattering Inspection and Analysis : THEIAG1308EUROPEAN UNIONPCIG14-GA-2013-630833
CHRONOS - Route to On-Chip Resonating Optical Clocks via Nonlinear OpticsG1159EUROPEAN UNIONIIF-GA-2012-327627
UK Quantum Technology Hub for Sensors and MetrologyG1511EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/M013294/1
EPSRC Doctoral Training Partnership 2016-17UnsetEPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/N509784/1