It has long been thought that normal group-velocity dispersion (GVD) cannot be produced in free space via angular dispersion. Indeed, conventional diffractive or dispersive components such as gratings or prisms produce only anomalous GVD. We identify the conditions that must be fulfilled by the angular dispersion introduced into a plane-wave pulse to yield normal GVD. We then utilize a pulsed-beam shaper capable of introducing arbitrary angular-dispersion profiles to symmetrically produce normal and anomalous GVD in free space, which are realized here on the same footing for the first time.
Dynamic Dispersion Accumulation in Fiber Loops for Realizing Record-High Frequency Resolution or Ultra-Low Signal Sampling Rate in Dispersion-Based Photonics-Assisted Wideband Microwave Measurement Systems
Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University（上海多维信息处理重点实验室，华东师范大学）
Limits on the free-space group velocity of optical wave packets incorporating angular dispersion. Part~II, non-differentiable angular dispersion: tutorial
University of Central Florida（中佛罗里达大学）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）
Thomas J. Watson Laboratories of Applied Physics, California Institute of Technology（加州理工学院托马斯·J·沃森应用物理实验室）；Department of Electrical and Computer Engineering, Yale University（耶鲁大学电气与计算机工程系）；Energy Sciences Institute, Yale University（耶鲁大学能源科学研究所）；Department of Applied Physics, Yale University（耶鲁大学应用物理系）
A dispersion-driven 3D color near-eye meta-display
National Engineering Laboratory of Special Display Technology, School of Instrumentation and Opto-Electronics Engineering, Hefei University of Technology（合肥工业大学仪器科学与光电工程学院特殊显示技术国家工程实验室）；University of Science and Technology of China（中国科学技术大学）
Near-elliptic core triangular-lattice and square-lattice PCFs: a comparison of birefringence, cut-off and GVD characteristics towards fiber device application
Broadband Single-Shot THz Sampling Using Reflection Gratings
Max Planck Institute for the Structure and Dynamics of Matter（马克斯·普朗克物质结构与动力学研究所）；Department of Physics, Clarendon Laboratory, University of Oxford（牛津大学克拉伦登实验室物理系）
