Spatial and Temporal Coherence in Strongly Coupled Plasmonic Bose-Einstein Condensates

TL;DR

This paper demonstrates long-range spatial and temporal coherence in strongly coupled plasmonic Bose-Einstein condensates, revealing non-exponential decay patterns that suggest complex underlying correlation behaviors in 2D plasmonic lattices.

Contribution

It presents the first observation of spatial and temporal correlations in strongly coupled plasmonic BECs, highlighting their potential for studying long-range coherence in 2D systems.

Findings

Large condensate size exceeds coherence and healing lengths

Spatial and temporal coherence decay non-exponentially

Evidence of power-law or stretched exponential correlation decay

Abstract

We report first-order spatial and temporal correlations in strongly coupled plasmonic Bose-Einstein condensates. The condensate is large, more than twenty times the spatial coherence length of the polaritons in the uncondensed system and hundred times the healing length, making plasmonic lattices an attractive platform for studying long-range spatial correlations in two dimensions (2D). We find that both spatial and temporal coherence display non-exponential decay; the results suggest power-law or stretched exponential behaviour with different exponents for spatial and temporal correlation decays.