Near-zero-index ultra-fast pulse characterization

Jaffray, W. et al. (2022) Near-zero-index ultra-fast pulse characterization. Nature Communications, 13, 3536. (doi: 10.1038/s41467-022-31151-4) (PMID:35725983) (PMCID:PMC9209551)

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Transparent conducting oxides exhibit giant optical nonlinearities in the near-infrared window where their linear index approaches zero. Despite the magnitude and speed of these nonlinearities, a “killer” optical application for these compounds has yet to be found. Because of the absorptive nature of the typically used intraband transitions, out-of-plane configurations with short optical paths should be considered. In this direction, we propose an alternative frequency-resolved optical gating scheme for the characterization of ultra-fast optical pulses that exploits near-zero-index aluminium zinc oxide thin films. Besides the technological advantages in terms of manufacturability and cost, our system outperforms commercial modules in key metrics, such as operational bandwidth, sensitivity, and robustness. The performance enhancement comes with the additional benefit of simultaneous self-phase-matched second and third harmonic generation. Because of the fundamental importance of novel methodologies to characterise ultra-fast events, our solution could be of fundamental use for numerous research labs and industries.

Item Type:Articles
Additional Information:MF wish to thank The Carnegie Trust (Research Incentive Grant ref:RIG009891), EPSRC (council reference 314 EP/P005446/1), and the RSE (grant application ID1671) for their economic support. FB acknowledges support by the Royal Academy of Engineering under the Research Fellowship scheme RF\202021\20\310. MC acknowledges support from UK Research and Innovation (UKRI), Innovation Fellowship, grant number EP/ S001573/1. Purdue co-authors acknowledge support from the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under Award No.DE-SC0017717 (material growth), the Office of Naval Research under Award N00014-20-1-2199.
Glasgow Author(s) Enlighten ID:Clerici, Professor Matteo
Authors: Jaffray, W., Belli, F., Carnemolla, E. G., Dobas, C., Mackenzie, M., Travers, J., Kar, A. K., Clerici, M., DeVault, C., Shalaev, V. M., Boltasseva, A., and Ferrera, M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Nature Communications
Publisher:Nature Research
ISSN (Online):2041-1723
Copyright Holders:Copyright © The Author(s) 2022
First Published:First published in Nature Communications 13: 3536
Publisher Policy:Reproduced under a Creative Commons licence
Data DOI:10.17861/8bca228b-a6d0-4afa-a390-d1e2a089c4aa

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302459Infrared time-domain quantum opticsMatteo ClericiEngineering and Physical Sciences Research Council (EPSRC)EP/S001573/1ENG - Electronics & Nanoscale Engineering