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  THz helicity mapping towards coherent control of chiral low-energy excitations

Frenzel, M., Minakova, O., Urban, J., Nest, L., Kampfrath, T., Spencer, M. S., et al. (2024). THz helicity mapping towards coherent control of chiral low-energy excitations. In M. Jarrahi, S. Preu, & D. Turchinovich (Eds.), Proceedings Volume 12994, Terahertz Photonics III. Bellingham, Washington: SPIE.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000F-9D8E-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-A97E-6
Genre: Conference Paper

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 Creators:
Frenzel, Maximilian1, Author                 
Minakova, Olga1, Author           
Urban, Joanna1, Author                 
Nest, Leona1, Author                 
Kampfrath, Tobias1, Author                 
Spencer, Michael S.1, Author                 
Maehrlein, Sebastian F.1, Author                 
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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 Abstract: The advent of high-field terahertz (THz) sources opened the field of nonlinear THz physics and unlocked access to fundamental low energy excitations for ultrafast control of quantum materials and other correlated systems. Recent concepts employing angular momentum of THz light, e.g. for driving chiral excitations, rely on the undistorted measurement of THz fields and on the precise knowledge about sophisticated THz helicity states. Both of these requirements pose experimental challenges when employing intense single-cycle pulses, because THz attenuators commonly do not completely conserve polarization states and the few broadband THz polarization optics suffer from significant transmission losses. Here, we resolve both challenges by employing z-cut α-quartz as a versatile and costefficient electro-optic THz detector. Quartz’s moderate electro-optic coefficient in conjunction with the threefold x(2) symmetry enables direct retrieval of the vectorial THz field trajectory. The retrieved amplitude- and phase-resolved time domain information can be easily mapped into a circular basis or on a Poincaré sphere in frequency domain. By this approach, we provide a convenient procedure to measure and map sophisticated THz polarization states relevant for interpreting THz ellipsometry data and for THz pulse shaping towards coherent control of chiral low-energy excitations in future.

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Language(s): eng - English
 Dates: 2024-06-18
 Publication Status: Issued
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1117/12.3024122
 Degree: -

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Title: SPIE Photonics Europe 2024
Place of Event: Strasbourg, Fance
Start-/End Date: 2024-04-07 - 2024-04-12
Invited: Yes

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Title: Proceedings Volume 12994, Terahertz Photonics III
Source Genre: Proceedings
 Creator(s):
Jarrahi, Mona, Editor
Preu, Sascha, Editor
Turchinovich, Dmitry, Editor
Affiliations:
-
Publ. Info: Bellingham, Washington : SPIE
Pages: 4 Volume / Issue: 12994 Sequence Number: 1299401 Start / End Page: - Identifier: ISSN: 0277786X
ISBN: 9781510673069