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Nonlinear field-control of terahertz waves in random media for spatiotemporal focusing

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posted on 2023-06-10, 02:51 authored by Vittorio Cecconi, Vivek Kumar, Alessia Pasquazi, Juan Sebastian Totero Gongora, Marco Peccianti
Controlling 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 Europe

ISSN

2732-5121

Publisher

F1000 Research Ltd

Issue

32

Volume

2

Department 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

2022-03-09

First Open Access (FOA) Date

2022-03-09

First Compliant Deposit (FCD) Date

2022-03-08

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