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Near-zero-index ultra-fast pulse characterization.

ABSTRACT: 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.

SUBMITTER: Jaffray W

PROVIDER: S-EPMC9209551 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Near-zero-index ultra-fast pulse characterization.

Jaffray Wallace W Belli Federico F Carnemolla Enrico G EG Dobas Catalina C Mackenzie Mark M Travers John J Kar Ajoy K AK Clerici Matteo M DeVault Clayton C Shalaev Vladimir M VM Boltasseva Alexandra A Ferrera Marcello M

Nature communications 20220620 1

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 sc ...[more]

PMID: 35725983

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Dataset Information

Near-zero-index ultra-fast pulse characterization.

Publications

Near-zero-index ultra-fast pulse characterization.

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