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  Second Harmonic Generation from Phononic Epsilon-Near-Zero Berreman Modes in Ultrathin Polar Crystal Films

Paßler, N., Razdolski, I., Katzer, D. S., Storm, D. F., Caldwell, J. D., Wolf, M., et al. (2019). Second Harmonic Generation from Phononic Epsilon-Near-Zero Berreman Modes in Ultrathin Polar Crystal Films. ACS Photonics, 6(6), 1365-1371. doi:10.1021/acsphotonics.9b00290.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-99CE-A Version Permalink: https://hdl.handle.net/21.11116/0000-0009-695E-9
Genre: Journal Article

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 Creators:
Paßler, Nikolai1, Author           
Razdolski, Ilya1, Author           
Katzer, D. Scott2, Author
Storm, D. F.2, Author
Caldwell, Joshua D.2, 3, Author
Wolf, Martin1, Author           
Paarmann, Alexander1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2US Naval Research Laboratory, 4555 Overlook Avenue SW, Washington DC 20375, USA, ou_persistent22              
3Vanderbilt University, Institute of Nanoscale Science and Engineering, 2201 West End Avenue, PMB 350106, Nashville, Tennessee 37235-0106, United States, ou_persistent22              

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Free keywords: Physics, Optics, physics.optics
 Abstract: Immense optical field enhancement was predicted to occur for the Berreman mode in ultrathin films at frequencies in the vicinity of epsilon-near-zero (ENZ). Here, we report the first experimental proof of this prediction in the mid-infrared by probing the resonantly enhanced second harmonic generation (SHG) at the longitudinal optic phonon frequency from a deeply subwavelength-thin aluminum nitride (AlN) film. Employing a transfer matrix formalism, we show that the field enhancement is completely localized inside the AlN layer, revealing that the observed SHG signal of the Berreman mode is solely generated in the AlN film. Our results demonstrate that ENZ Berreman modes in intrinsically low-loss polar dielectric crystals constitute a promising platform for nonlinear nanophotonic applications.

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Language(s): eng - English
 Dates: 2018-11-262019-02-202019-06-19
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acsphotonics.9b00290
arXiv: 1811.10370
URI: http://arxiv.org/abs/1811.10370
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Title: ACS Photonics
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: 7 Volume / Issue: 6 (6) Sequence Number: - Start / End Page: 1365 - 1371 Identifier: ISSN: 2330-4022
CoNE: https://pure.mpg.de/cone/journals/resource/2330-4022