About the Cover:
The image on the cover for Advanced Photonics Volume 2, Issue 4, illustrates the Rabi oscillation of azimuthons in a weakly nonlinear circular waveguide with weakly longitudinally periodic modulated refractive index change. The image is based on the original research presented in the article by Kaichao Jin, Yongdong Li, Feng Li, Milivoj Belic, Yanpeng Zhang, Yiqi Zhang: “Rabi oscillations of azimuthons in weakly nonlinear waveguides,” Adv. Photon. 2(4), 046002, doi: 10.1117/1.AP.2.4.046002.
Reviews
Recent advances in optoelectronic oscillators
Tengfei Hao, Yanzhong Liu, Jian Tang, Qizhuang Cen, Wei Li, Ninghua Zhu, Yitang Dai, José Capmany, Jianping Yao, and Ming Li
Vol. 2, Issue 4, 044001 (2020)
Letters
Two-channel, dual-beam-mode, wavelength-tunable femtosecond optical parametric oscillator
Jintao Fan, Jun Zhao, Liping Shi, Na Xiao, and Minglie Hu
Vol. 2, Issue 4, 045001 (2020)
Research Articles
Stretching the spectra of Kerr frequency combs with self-adaptive boundary silicon waveguides
Jianhao Zhang, Vincent Pelgrin, Carlos Alonso-Ramos, Laurent Vivien, Sailing He, and Eric Cassan
Vol. 2, Issue 4, 046001 (2020)
Rabi oscillations of azimuthons in weakly nonlinear waveguides 
Kaichao Jin, Yongdong Li, Feng Li, Milivoj R. Belić, Yanpeng Zhang, and Yiqi Zhang
Vol. 2, Issue 4, 046002 (2020)
Nanopolaritonic second-order topological insulator based on graphene plasmons
Minwoo Jung, Ran G. Gladstone, and Gennady Shvets
Vol. 2, Issue 4, 046003 (2020)
Spatial and spectral mode mapping of a dielectric nanodot by broadband interferometric homodyne scanning near-field spectroscopy
Jinxin Zhan, Wei Wang, Jens Brauer, Lukas Schmidt-Mende, Christoph Lienau, and Petra Groß
Vol. 2, Issue 4, 046004 (2020)
