Abstract
On-chip light sources are essential components for integrated photonic circuits and quantum information processing chips. High directionality, high collection efficiency, and ultrasmall feature size are the most significant features for a light source in the wavelength range for optical communication, around 1550 nm. The authors use nanomanipulation to create an ultrasmall, unidirectional on-chip light source based on PbS quantum dots and an epsilon-near-zero (ENZ) material. This work not only shows the way to integrated photonic devices based on ENZ materials, but also provides an advanced method for the precise assembly of composite functional nanostructures.
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