Dr. Zhenglong Zhang is a professor of physics at Shaanxi Normal University, China. He received his Ph.D. in 2013 from Shaanxi Normal University and the Institute of Physics, Chinese Academy of Sciences. Then, he joined the Leibniz Institute of Photonic Technology in Jena, Germany, as an Av-H fellow until September 2016. His research interests include plasmonics and tip-enhanced Raman spectroscopy....