Dr. Iqbal Bakti Utama | Chemomechanical Modification Of Quantum Emission In Monolayer WSE2

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 attracted attention for quantum information science due to their ability to host single-photon emitters (SPEs). Although the properties of atomically thin materials are highly sensitive to surface modification, chemical functionalization remains unexplored in the design and control of 2D material SPEs. Here, we report a chemomechanical approach to modify SPEs in monolayer WSe2 through the synergistic combination of localized mechanical strain and noncovalent surface functionalization with aryl diazonium chemistry. By revealing conditions under which chemical functionalization tunes SPEs, this work broadens the parameter space for controlling quantum emission in 2D materials.  Several key parameters on 2D materials need to be improved for them to work as optically active qubits in practical applications, including extraction efficiency, excited-state lifetime, coherence time, quantum efficiency, stability, and emission wavelength control.