Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas

Abstract

Single photon emitters in atomically-thin semiconductors can be deterministically positioned using strain induced by underlying nano-structures. Here, we couple monolayer WSe${}_2$ to high-refractive-index gallium phosphide dielectric nano-antennas providing both optical enhancement and monolayer deformation. For single photon emitters formed on such nano-antennas, we find very low (femto-Joule) saturation pulse energies and up to 10${}^4$ times brighter photoluminescence than in WSe${}_2$ placed on low-refractive-index SiO${}_2$ pillars. We show that the key to these observations is the increase on average by a factor of 5 in the quantum efficiency of the emitters coupled to the nano-antennas. This further allowed us to gain new insights into their photoluminescence dynamics, revealing the roles of the dark exciton reservoir and Auger processes. We also find that the coherence time of such emitters is limited by intrinsic dephasing processes. Our work establishes dielectric nano-antennas as a platform for high-efficiency quantum light generation in monolayer semiconductors.

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Cited by in corpus (17)

• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• Prospects and challenges of quantum emitters in 2D materials
• Roadmap for Photonics with 2D Materials
• Photoluminescence imaging of single photon emitters within nanoscale strain profiles in monolayer WSe${}_2$
• Cavity-Enhanced 2D Material Quantum Emitters Deterministically Integrated with Silicon Nitride Microresonators
• Ultra-bright single photon source based on an atomically thin material
• Transition metal dichalcogenide dimer nano-antennas with ultra-small gaps
• Van der Waals Nanoantennas on Gold as Hosts for Hybrid Mie-Plasmonic Resonances
• Fluorescence enhancement in topologically optimized gallium phosphide all-dielectric nanoantennas
• Creation and Microscopic Origins of Single-Photon Emitters in Transition Metal Dichalcogenides and Hexagonal Boron Nitride
• Realization of Z${}_2$ topological photonic insulators made from multilayer transition metal dichalcogenides
• Excitons in Atomically Thin TMD in Electric and Magnetic Fields
• Directional silicon nano-antennas for quantum emitter control designed by evolutionary optimization
• High Temperature Quantum Emission from Covalently Functionalized van der Waals Heterostructures
• Silicon nanoantennas for tailoring the optical properties of MoS2 monolayers
• Optical properties of Fermi polarons in a GaInP/MoSe2 monolayer heterostructure
• Deterministic and Scalable Quantum Light Generation in DNA Origami-Programmed Organic Molecule-MoS${}_2$ Monolayer Hybrids