English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this article, we demonstrate experimentally and verified numerically theexcitation of Berreman modes that propagate in a dielectric film of uniaxialanisotropic nanoporous alumina grown on an aluminium substrate. It is anair-dielectric-metal asymmetric polaritonic system with a real part of theeffective permittivity having a value near zero. The modes are excited at awavelength lower than the epsilon near zero wavelength region. Minimumreflection is observed for the mid-infrared p-polarized light, while maximumreflection is observed for the s-polarized light. The experimental results arenumerically reproduced for both p- and s-polarized light and confirm theBerreman modes excitation in the system. At the exciting wavelength, the fieldis confined in the dielectric region near the air-dielectric interface. Thereported system is straightforward and could be easily fabricated over a largescale and is helpful in a variety of mid-infrared applications such as thermalmanagement systems, sensors, passive radiative cooling devices, non-linearapplications, and terahertz frequency generation.

Experimental observation of Berreman modes in uniaxial anisotropic nanoporous alumina film on aluminium substrate