332 citations · 1.6k across the 27 of their papers we have counts for
27 papers
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…
Roadmap on Nonlocality in Photonic Materials and Metamaterials
Francesco Monticone, N. Asger Mortensen, Antonio I. Fernández-Domínguez +63
Photonic technologies continue to drive the quest for new optical materials with unprecedented responses. A major frontier in this field is the exploration of nonlocal (spatially d…
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…
Transport measurements of majorization order for wave coherence
Cheng Guo, David A. B. Miller, Shanhui Fan
We investigate the majorization order for comparing wave coherence and reveal its fundamental consequences in transport measurements, including power distribution, absorption, tran…
Unitary control of partially coherent waves. II. Transmission or reflection
Cheng Guo, Shanhui Fan
Coherent control of wave transmission and reflection is crucial for applications in communication, imaging, and sensing. However, many practical scenarios involve partially coheren…
Unitary control of partially coherent waves. I. Absorption
Cheng Guo, Shanhui Fan
The coherent control of wave absorption has important applications in areas such as energy harvesting, imaging, and sensing. However, most practical scenarios involve the absorptio…
Unitary control of multiport wave transmission
Cheng Guo, David A. B. Miller, Shanhui Fan
Controlling wave transmission is crucial for various applications. In this work, we apply the concept of unitary control to manipulate multiport wave transmission. Unitary control…
Topological winding guaranteed coherent orthogonal scattering
Cheng Guo, Shanhui Fan
Coherent control has enabled various novel phenomena in wave scattering. We introduce an effect called coherent orthogonal scattering, where the output wave becomes orthogonal to t…
Winding number criterion for the origin to belong to the numerical range of a matrix on a loop of matrices
Cheng Guo, Shanhui Fan
Let be continuous with , thus the winding number of is well-defined. If the winding number is not divisible by , then the origi…
Topological nature of non-Hermitian degenerate bands in structural parameter space
Olivia Y. Long, Cheng Guo, Shanhui Fan
In photonics, band degeneracies at high-symmetry points in wavevector space have been shown to exhibit rich physical phenomena. However, obtaining degenerate bands away from such p…
Roadmap on spatiotemporal light fields
Yijie Shen, Qiwen Zhan, Logan G. Wright +42
Spatiotemporal sculpturing of light pulse with ultimately sophisticated structures represents the holy grail of the human everlasting pursue of ultrafast information transmission a…
Light control with Weyl semimetals
Cheng Guo, Viktar S. Asadchy, Bo Zhao +1
Weyl semimetals are topological materials whose electron quasiparticles obey the Weyl equation. They possess many unusual properties that may lead to new applications. This is a tu…
Polarization-independent isotropic nonlocal metasurfaces with wavelength-controlled functionality
Olivia Y. Long, Cheng Guo, Weiliang Jin +1
Flat optics has demonstrated great advances in miniaturizing conventional, bulky optical elements due to the recent developments in metasurface design. Specific applications of suc…
Adaptive four-level modeling of laser cooling of solids
Weiliang Jin, Cheng Guo, Meir Orenstein +1
Laser cooling of rare-earth doped solids has been demonstrated across a wide range of material platforms, inspiring the development of simple phenomenological models such as the fo…
Non-Dispersive Space-Time Wave Packets Propagating in Dispersive Media
Hao He, Cheng Guo, Meng Xiao
Space-time wave packets can propagate invariantly in free space with arbitrary group velocity thanks to the spatio-temporal correlation. Here it is proved that the space-time wave…
Isotropic Topological Second-Order Spatial Differentiator Operating in Transmission Mode
Olivia Y. Long, Cheng Guo, Haiwen Wang +1
Differentiation has widespread applications, particularly in image processing for edge detection. Significant advances have been made in using nanophotonic structures and metamater…
Violating Kirchhoff's Law of Thermal Radiation in Semitransparent Structures
Yubin Park, Viktar S. Asadchy, Bo Zhao +3
Kirchhoff's law of thermal radiation imposes a constraint on photon-based energy harvesting processes since part of the incident energy flux is inevitably emitted back to the sourc…
Controllable finite ultra-narrow quality-factor peak in a perturbed Dirac-cone band structure of a photonic crystal slab
Alex Y. Song, Akhil Raj Kumar Kalapala, Ricky Gibson +9
We show that by using a perturbed photonic Dirac-cone, one can realize ultra-narrow and finite Q-factor peak in the wavevector space, with both the peak value and the width separat…
Squeeze free space with nonlocal flat optics
Cheng Guo, Haiwen Wang, Shanhui Fan
There has been substantial interest in miniaturizing optical systems by flat optics. However, one essential optical component, free space, fundamentally cannot be substituted with…
Three-dimensional random dielectric colloid metamaterial with giant isotropic optical activity
Viktar Asadchy, Cheng Guo, Ihar Faniayeu +1
Motivated by the theoretical observation that isotropic chirality can exist even in completely random systems, we design a dielectric metamaterial consisting of a random colloid of…