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Meta-material based THz applications in spectroscopy and electron optics

English title Meta-material based THz applications in spectroscopy and electron optics
Applicant Feurer Thomas
Number 153036
Funding scheme Project funding (Div. I-III)
Research institution Institut für angewandte Physik Universität Bern
Institution of higher education University of Berne - BE
Main discipline Other disciplines of Physics
Start/End 01.04.2014 - 31.03.2016
Approved amount 300'000.00
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Keywords (4)

Meta-materials; THz time domain spectroscopy; THz near-field imaging; Electron optics

Lay Summary (German)

Lead
Plasmonische Strukturen im THz Bereich zeigen eine gigantische Feldueberhoehung und koennen damit fuer eine Vielzahl von spektroskopischen und anderen Anwendungen eingesetzt werden. In diesem Projekt untersuchen wir speziell den Einsatz dieser Strukturen in der nichtlinearen THz Spektroskopie und der Elektronenoptik.
Lay summary

Strahlungsquellen im THz Bereich sind immer noch nicht intensiv genug, um sie fuer nichtlineare Spektroskopie einsetzen zu koennen. Hier koennen sogenannte plasmonische Strukturen helfen, die das eingestrahlte THz Feld absorbieren und auf kleinste Volumina fokusieren. Die damit einhergehende Feldueberhoehung kann viele Groessenordnungen betragen und zusammen mit heutigen Strahlungsquellen zur noetigen Feldstaerke fuehren. Diese Strukturen sind extrem vielseitig einsetzbar, nicht nur in der THz Spektroskopie. Hauptsaechlich mittels Simulationen wollen wir zeigen, dass diese Strukturen auch zur Manipulation von Elektronenstrahlen eingesetzt werden koennen, z.B. als ultraschnelle Streakkamera.

Direct link to Lay Summary Last update: 28.03.2014

Responsible applicant and co-applicants

Employees

Publications

Publication
Giant Electric Field Enhancement in Split Ring Resonators Featuring Nanometer-Sized Gaps
Bagiante Salvatore, Enderli Florian, Fabianska Justyna, Sigg Hans, Feurer Thomas (2015), Giant Electric Field Enhancement in Split Ring Resonators Featuring Nanometer-Sized Gaps, in Scientific Reports, 5, 1-5.
Distortion-free enhancement of terahertz signals measured by electro-optic sampling. I. Theory
Brunner Fabian, Johnson Jeremy, Gruebel Sebastian, Ferrer Andres, Johnson Steve, Feurer Thomas (2014), Distortion-free enhancement of terahertz signals measured by electro-optic sampling. I. Theory, in JOSA B, 31(4), 904-910.
Distortion-free enhancement of terahertz signals measured by electro-optic sampling. II. Experiment
Johnson Jeremy, Brunner Fabian, Gruebel Sebastian, Ferrer Andres, Johnson Steve, Feurer Thomas (2014), Distortion-free enhancement of terahertz signals measured by electro-optic sampling. II. Experiment, in JOSA B, 31(5), 1035-1040.
Split ring resonator based THz-driven electron streak camera featuring femtosecond resolution
Fabianska Justyna, Kassier Gunther, Feurer Thomas (2014), Split ring resonator based THz-driven electron streak camera featuring femtosecond resolution, in Scientific Reports, 4, 1-6.

Collaboration

Group / person Country
Types of collaboration
G. Kassier, Max Planck Research Department for Structural Dynamics, Hamburg (D) Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Prof. Keith A. Nelson / MIT, Dept. of Chemistry, 77 Massachusetts Ave, MA 02139 Cambridge, USA United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
- Exchange of personnel
Ch. David / Laboratory for Micro- and Nanotechnology, PSI, 5232 Villigen PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
- Exchange of personnel
Prof. O-Pil Kwon / Department of Molecular Science and Technology, Ajou University, Suwon Korean Republic (South Korea) (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Optical Terahertz Science and Technology Conference Poster Out-of-plane THz electric field enhancement in vertical nano-slit arrays 10.03.2015 San Diego, United States of America Waeber Yannik; Feurer Thomas;
Optical Terahertz Science and Technology Conference Talk given at a conference Auto-induced frequency shift in a split ring resonator by high THz electric fields 10.03.2015 San Diego, United States of America Feurer Thomas; Fabianska Justyna;
SPIE Photonics West 2015 Talk given at a conference Split ring resonator based THz-driven electron streak camera featuring femtosecond resolution 11.02.2015 San Francisco, United States of America Fabianska Justyna; Feurer Thomas;
4th EOS Topical Meeting on Terahertz Science & Technology Talk given at a conference Absolute Measurement of the Field Enhancement in Split Ring Resonators Featuring Nanometer-Sized Gaps 11.05.2014 Camogli, Italy Feurer Thomas; Fabianska Justyna;
4th EOS Topical Meeting on Terahertz Science & Technology Talk given at a conference Shift of the resonance frequency of split-ring resonators induced by high THz electric field strengths 11.05.2014 Camogli, Italy Fabianska Justyna; Feurer Thomas;


Associated projects

Number Title Start Funding scheme
165686 Nearfield enhanced THz electron acceleration and spectroscopy 01.04.2016 Project funding (Div. I-III)
140943 Complex THz meta-materials 01.04.2012 Project funding (Div. I-III)
165686 Nearfield enhanced THz electron acceleration and spectroscopy 01.04.2016 Project funding (Div. I-III)

Abstract

With the advent of meta-materials, which are mostly composed of sub-wavelength resonating structures, unprecedented electromagnetic material properties became accessible. These unusual properties are based on the microscopic electric and magnetic response of the constituting building blocks to an incident electromagnetic wave. Over the past years we have developed two complementary experimental techniques to measure the vector electric near-field distributions in the THz spectral range. With these techniques we have investigated the near-field distribution of several sub-wavelength structures (meta-materials), couplings between them, and couplings to lattice modes once they are arranged in periodic arrays. We found that, with slight modifications, these sub-wavelength structures can be used advantageously in two different fields, namely in THz spectroscopy and in electron optical devices.In THz spectroscopy, we want to make use of the giant field enhancement that comes hand in hand with introducing submicron-sized voids in these structures. Despite all efforts in THz near-field imaging it is impossible to measure the resulting field enhancement factors directly, which is why we propose different indirect methods to asses them. Further methods involve spatially resolved THz pulse transmission measurements and THz spectroscopic applications.We also want to demonstrate, through simulations mostly, that these sub-wavelength structures may find useful applications in electron trajectory manipulation. We propose a THz streak camera with possibly femtosecond time resolution based on a split ring resonator. Moreover, we propose a structure composed of several split ring resonators mimicking a THz-driven analogue of an undulator or a wiggler.
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