Phys.org January 17, 2023 Optically active defects in 2D materials, such as hexagonal boron nitride (hBN) and transition-metal dichalcogenides (TMDs), are an attractive class of single-photon emitters. An international team of researchers (USA – UC Santa Barbara, Japan) has demonstrated a novel approach to precisely align and embed hBN and TMDs within background-free silicon nitride microring resonators. Through the Purcell effect, high-purity hBN emitters exhibited a cavity-enhanced spectral coupling efficiency of up to 46% at room temperature, exceeding the theoretical limit (up to 40%) for cavity-free waveguide-emitter coupling and demonstrated nearly a 1 order of magnitude improvement over previous work. […]
Category Archives: Single photon emitter
On-demand room-temperature single photon array—a quantum communication breakthrough
Phys.org September 21, 2018 An international team of researchers (USA – City College of New York, Australia, Lithuania) has demonstrated large arrays of room-temperature quantum emitters in two-dimensional hexagonal boron nitride. The large energy gap inherent in substrate-induced deformation in hBN stabilizes the emitters at room temperature within nanoscale regions. Combining analytical and numerical modeling, they showed that emitter activation is the result of carrier trapping in deformation potential wells. The breakthrough has solved a long-standing and practical hurdle of realizing deterministic single photon emitters at room temperature… read more. Open Access TECHNICAL ARTICLE