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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The discovery of photonic hyperbolic dispersion surfaces in certain van derWaals bonded solids, such as hexagonal boron nitride and bismuth selenide (atopological insulator), offers intriguing possibilities for creating stronglymodified light-matter interactions. However, open problems exist in quantifyingelectromagnetic field fluctuations in these media, complicating typicalapproaches for modeling photonic characteristics. Here, we address this issueby linking the identifying traits of hyperbolic response to a coupling betweenlongitudinal and transverse fields that can not occur in isotropic media. Thisdescription allows us to calculate the influence of hyperbolic response onelectromagnetic fluctuations without explicitly imposing a characteristic size(model of nonlocality), leading to formally bounded expressions so long asmaterial absorption is included. We then apply this framework to two exemplaryareas: the optical sum rule for modified spontaneous emission enhancement in ageneral uniaxial medium, and thermal electromagnetic field fluctuations inhexagonal boron nitride and bismuth selenide. We find that while the sum ruleis satisfied, it does not constrain the enhancement of light-matterinteractions in either case. We also show that both hexagonal boron nitride andbismuth selenide possess broad spectral regions where the magnitude ofelectromagnetic field fluctuations are over 120 times larger, and over 800times larger along specific angular directions, than they are in vacuum.

physical review. a/physical review, a

Definition of Polaritonic Fluctuations in Natural Hyperbolic Media:  Applications to Hexagonal Boron Nitride, Bismuth Selenide and the Spontaneous  Emission Sum Rule