Mixed-dimensional heterostructures for quantum photonic science and technology

Quantum information science has the potential to transform computing, communication, and sensing. Among quantum architectures, photonic systems have the advantage of producing mobile qubits for high-speed information transmission. Single photons play a critical role in this context, and significant attention has been dedicated to developing solid-state materials with robust single-photon emission properties. Two-dimensional (2D) materials have emerged as one of the most promising platforms for single-photon emitter states. The van der Waals bonding and all-surface nature of 2D materials further provide opportunities for tuning single-photon emission properties via integration with other n -dimensional materials ( n = 0, 1, or 3). Here, we review recent developments in the study of single-photon emitters based on mixed-dimensional heterostructures involving 2D materials. We also provide a forward-looking perspective on the key opportunities and remaining challenges for realizing the full potential of mixed-dimensional heterostructures for quantum photonic science and technology. Graphical abstract