Southwest Quantum Information and Technology

Colloidal Cadmium Selenide Quantum Dots Doped with Manganese (Mn:CdSe) as a Tool for Quantum Sensing

Presenting Author: Tommy Nguyen, University of Washington

Quantum point defects in crystals are promising nanoscale sensors for a wide range of applications from magnetism in condensed matter systems to single molecule NMR. One outstanding challenge for defects in single crystal samples is controlling the sensor-sample distance. Here we present a defect-based sensing system based on transition-metal-doped colloidal quantum dots. Colloidal doped quantum dots provide a mechanism to control the dopant spin via the spin exchange coupling between the dopant and quantum dot exciton. Here we outline initialization, control and readout mechanisms for the Mn:CdSe quantum system and present initial results toward single Mn:CdSe isolation in quantum dots which exhibit exchange splittings large enough to optically resolve the Mn spin state.

(Session 5 : Thursday from 5:00 pm - 7:00 pm)