Abstract

Atomically layered van der Waals materials exhibit remarkable properties, including highly-confined infrared waveguide modes and the capacity for infrared emission in the monolayer limit. Here, structures were engineered that encase a photoluminescing atomic sheet of MoTe₂ within two bulk crystals of WSe2, forming a vdW waveguide for the embedded light-emitting monolayer. The modified electromagnetic environment offered by the WSe₂ waveguide alters MoTe₂ spontaneous emission, directly imaged with interferometric nano-photoluminescence. Spatially oscillating nanoscale patterns were captured, prompted by spontaneous emission from MoTe₂ into waveguide modes of WSe₂ slabs. The resulting Purcell-enhanced emission rate was quantified within a waveguide quantum electrodynamics model, relating the MoTe₂ spontaneous emission rate to the measured waveguide dispersion.

Abstract

Atomically layered van der Waals materials exhibit remarkable properties, including highly-confined infrared waveguide modes and the capacity for infrared emission in the monolayer limit. Here, structures were engineered that encase a photoluminescing atomic sheet of MoTe₂ within two bulk crystals of WSe2, forming a vdW waveguide for the embedded light-emitting monolayer. The modified electromagnetic environment offered by the WSe₂ waveguide alters MoTe₂ spontaneous emission, directly imaged with interferometric nano-photoluminescence. Spatially oscillating nanoscale patterns were captured, prompted by spontaneous emission from MoTe₂ into waveguide modes of WSe₂ slabs. The resulting Purcell-enhanced emission rate was quantified within a waveguide quantum electrodynamics model, relating the MoTe₂ spontaneous emission rate to the measured waveguide dispersion.

Abstract

Atomically layered van der Waals materials exhibit remarkable properties, including highly-confined infrared waveguide modes and the capacity for infrared emission in the monolayer limit. Here, structures were engineered that encase a photoluminescing atomic sheet of MoTe₂ within two bulk crystals of WSe2, forming a vdW waveguide for the embedded light-emitting monolayer. The modified electromagnetic environment offered by the WSe₂ waveguide alters MoTe₂ spontaneous emission, directly imaged with interferometric nano-photoluminescence. Spatially oscillating nanoscale patterns were captured, prompted by spontaneous emission from MoTe₂ into waveguide modes of WSe₂ slabs. The resulting Purcell-enhanced emission rate was quantified within a waveguide quantum electrodynamics model, relating the MoTe₂ spontaneous emission rate to the measured waveguide dispersion.

Abstract

Atomically layered van der Waals materials exhibit remarkable properties, including highly-confined infrared waveguide modes and the capacity for infrared emission in the monolayer limit. Here, structures were engineered that encase a photoluminescing atomic sheet of MoTe₂ within two bulk crystals of WSe2, forming a vdW waveguide for the embedded light-emitting monolayer. The modified electromagnetic environment offered by the WSe₂ waveguide alters MoTe₂ spontaneous emission, directly imaged with interferometric nano-photoluminescence. Spatially oscillating nanoscale patterns were captured, prompted by spontaneous emission from MoTe₂ into waveguide modes of WSe₂ slabs. The resulting Purcell-enhanced emission rate was quantified within a waveguide quantum electrodynamics model, relating the MoTe₂ spontaneous emission rate to the measured waveguide dispersion.