posted on 2023-12-09, 14:12authored byBin Liu, Jeffrey Horowitz, Stephen R. Forrest
Guiding
long-range energy transport is key to enabling a diversity
of photonic and optoelectronic device operations, such as optical
routing, light emission, and photocurrent generation. For this purpose,
Bloch surface waves sustained by truncated dielectric multilayer structures
have been exploited for strong coupling with excitons in organic materials
and 2D inorganic semiconductors. The hybrid light–matter states,
called Bloch surface wave polaritons (BSWPs), have been shown to support
long-range energy transport. However, guided BSWPs have not yet been
reported. Here, we demonstrate that patterned distributed Bragg reflector
waveguides combined with an excitonic, organic thin film that support
laterally confined BSWPs can guide exciton polariton propagation over
distances approaching 60 μm at room temperature. The 5 μm
wide ridge waveguides support up to seven BSWP modes, whose propagation
lengths increase with the number of dielectric pairs due to the increased
quality factor of the system. Our results provide a practical approach
for the systematic guiding of energy transport mediated by BSWPs,
thus enabling a new generation of polaritonic integrated circuits
that operate under ambient conditions.