How Thin Multilayer Hyperbolic Metamaterial Can Be?

Johneph Sukham, M. Mahmoodi, S. Sychev, Andrey Bogdanov, Osamu Takayama, S. H. Tavassoli, Radu Malureanu, A.V. Lavrinenko

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The capability to support optical waves with large wavevectors (high-k) is one of the principle features of hyperbolic metamaterials (HMMs). These waves play the key role in HMM applications such as imaging, sensing and lifetime engineering. To predict HMMs behavior a simple and convenient analytical effective medium approximation (EMA) is widely used. Theoretically, EMA is applicable to a deeply subwavelength unit cell of implicitly infinite periodic structures. So, in order to confidently use the EMA for the practical implementation HMMs, the question is what are constrains on the thickness, i.e. number of periods, of a realistic design to claim the validity of the EMA conclusions. We fabricated a series of stacks with 1, 2, … 10 periods of 10 nm gold – 10 nm alumina layers of exceptional quality keeping the roughness root mean square well below 1 nm. Characterization supported by modeling shows that starting from four periods, the multilayers properties are reasonably good expressed through EMA.
Original languageEnglish
Title of host publicationProceedings of 13th International Congress on Artificial Materials for Novel Wave Phenomena
PublisherIEEE
Publication date2019
PagesX-215-X-217
ISBN (Print)978-1-7281-0477-5
DOIs
Publication statusPublished - 2019
Event13th International Congress on Artificial Materials for Novel Wave Phenomena - Crowne Plaza Rome - St. Peter's , Rome, Italy
Duration: 16 Sep 201921 Sep 2019

Conference

Conference13th International Congress on Artificial Materials for Novel Wave Phenomena
LocationCrowne Plaza Rome - St. Peter's
Country/TerritoryItaly
CityRome
Period16/09/201921/09/2019

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