11 papers · 1 filter
Compound symmetries and double antisymmetry groups in linear time-invariant photonic systems
Yunrui Wang, Shiyu Li, Cheng Guo
Symmetry is fundamental to photonic systems. External (spatial) symmetries and internal symmetries---Lorentz reciprocity, energy conservation, and time-reversal symmetry---constrai…
Joint control of coherent transmission, reflection, and absorption
Shiyu Li, Dongha Kim, Shanhui Fan +1
Controlling multiple wave properties simultaneously poses a key challenge in coherent control of wave transport. We present a theory for joint coherent control of transmission, ref…
Generating topological non-diffracting beams using high quality factor nonlocal metasurfaces
Dongha Kim, Charles Pelzman, Cheng Guo +3
Non-diffracting optical beams are essential tools in photonics, enabling robust light transport, super-resolution imaging, and spatiotemporal control. While nonlocal metasurfaces h…
Spatiotemporal steering of non-diffracting wavepackets
Haiwen Wang, Cheng Guo, Shanhui Fan
We study the dynamics of space-time non-diffracting wavepackets, commonly known as light bullets, in a spatiotemporally varying medium. We show that by spatiotemporal refraction, a…
Passivity constraints on the relations between transmission, reflection, and absorption eigenvalues
Cheng Guo, Shanhui Fan
We investigate the passivity constraints on the relations between transmission, reflection, and absorption eigenvalues in linear time-invariant systems. Using techniques from matri…
Shaping space-time wavepackets beyond the paraxial limit using a dispersion magnifier
Dongha Kim, Cheng Guo, Peter B. Catrysse +1
Space-time wavepackets (STWPs) have received significant attention since they can propagate in free space at arbitrary group velocity without dispersion and diffraction. However, a…