Spectral broadening of a single Er$^{3+}$ ion in a Si nano-transistor

Jiliang Yang, 2 Jian Wang, 2 Wenda Fan, 2 Yangbo Zhang, 2 Changkui Duan, 2 Guangchong Hu, Gabriele G. de Boo, Brett C. Johnson, 5 Jeffrey C. McCallum, Sven Rogge, Chunming Yin, 2, ∗ and Jiangfeng Du 2 CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, NSW 2052, Australia Centre of Excellence for Quantum Computation and Communication Technology, School of Engineering, RMIT University, Victoria 3001, Australia Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Victoria 3010, Australia (Dated: January 28, 2022)