Asymmetric frequency dependence of plasma jet formation in resonator electrode Woo Jin Nam, Seung Taek Lee, Seok Yong Jeong, Jae Koo Lee and Gunsu S. Yun Eur. Phys. J. D, 71 5 (2017) 134 Published online: 25 May 2017 DOI: 10.1140/epjd/e2017-70549-4