Author Affiliations

Guixin Li,¹ Shumei Chen,^1,2 Nitipat Pholchai,^3,4,5 Bernhard Reineke,³ Polis Wing Han Wong,⁶ Edwin Yue Bun Pun,⁶ Kok Wai Cheah,² Thomas Zentgraf,³ and Shuang Zhang^1,*

¹School of Physics & Astronomy, University of Birmingham, Birmingham, B15 2TT, UK

²Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong

³Department of Physics, University of Paderborn, Warburger Straße 100, D-33098 Paderborn, Germany

⁴Department of Industrial Physics and Medical Instrumentation, King Mongkut's University of Technology North Bangkok, 1518 Pibulsongkram Road, Bangkok 10800, Thailand

⁵Lasers and Optics Research Group, King Mongkut's University of Technology North Bangkok, 1518 Pibulsongkram Road, Bangkok 10800, Thailand

⁶Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Ave, Hong Kong

^*Corresponding author: s.zhang@bham.ac.uk