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Nonlinear field-control of terahertz waves in random media for spatiotemporal focusing
journal contribution
posted on 2023-06-10, 02:51 authored by Vittorio Cecconi, Vivek Kumar, Alessia Pasquazi, Juan Sebastian Totero Gongora, Marco PecciantiControlling the transmission of broadband optical pulses in scattering media is a critical open challenge in photonics. To date, wavefront shaping techniques at optical frequencies have been successfully applied to control the spatial properties of multiple-scattered light. However, a fundamental restriction in achieving an equivalent degree of control over the temporal properties of a broadband pulse is the limited availability of experimental techniques to detect the coherent properties (i.e., the spectral amplitude and absolute phase) of the transmitted field. Terahertz experimental frameworks, on the contrary, enable measuring the field dynamics of broadband pulses at ultrafast (sub-cycle) time scales directly. In this work, we provide a theoretical/numerical demonstration that, within this context, complex scattering can be used to achieve spatio-temporal control of instantaneous fields and manipulate the temporal properties of single-cycle pulses by solely acting on spatial degrees of freedom of the illuminating field. As direct application scenarios, we demonstrate spatio-temporal focusing, chirp compensation, and control of the carrier-envelope-offset of a transform-limited THz pulse.
Funding
TIMING: Time-Resolved Nonlinear Ghost Imaging; G2016; EUROPEAN UNION; 725046
Route to Artificial Intelligence (AI) control of micro-comb lasers; G3064; LEVERHULME TRUST; ECF-2020-537
History
Publication status
- Published
File Version
- Published version
Journal
Open Research EuropeISSN
2732-5121Publisher
F1000 Research LtdExternal DOI
Issue
32Volume
2Department affiliated with
- Physics and Astronomy Publications
Notes
This is an Open Peer Review article. Use the link above to view the most recent version of the article.Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2022-03-09First Open Access (FOA) Date
2022-03-09First Compliant Deposit (FCD) Date
2022-03-08Usage metrics
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