1. Department of Applied Physics and Key Laboratory for Quantum Information and Quantum Optoelectronic Devices of Shaanxi Province, Xi’an Jiaotong University, Xi’an 710049, China
2. School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
3. Department of Electronics and Automation, Vocational School of Adana, Cukurova University, 01160 Cukurova, Adana, Turkey
4. College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.