187 citations · 2.2k across the 32 of their papers we have counts for
32 papers
Prevalence of two-dimensional photonic topology
Ali Ghorashi, Sachin Vaidya, Mikael Rechtsman +3
The topological characteristics of photonic crystals have been the subject of intense research in recent years. Despite this, the basic question of whether photonic band topology i…
Geometric similarities and topological phases in surface magnon polaritons
Chen Qian, Jicheng Jin, Thomas Christensen +4
Highly spatially-squeezed polaritons, with propagation momentum significantly larger than free-space modes at the same frequency, enable varied and extreme control over light-matte…
Topological Phases of Photonic Crystals under Crystalline Symmetries
Sachin Vaidya, Ali Ghorashi, Thomas Christensen +2
Photonic crystals (PhCs) have emerged as a popular platform for realizing various topological phases due to their flexibility and potential for device applications. In this article…
3D nonlinear optical metamaterials from twisted 2D van der Waals interfaces
Bumho Kim, Jicheng Jin, Zhi Wang +4
To enable new nonlinear responses, metamaterials are created by organizing structural units (meta-atoms) which are typically on the scale of about a hundred nanometers. However, tr…
Topological electromagnetic waves in dispersive and lossy plasma crystals
Chen Qian, Yue Jiang, Jicheng Jin +4
Topological photonic crystals, which offer topologically protected and back-scattering-immune transport channels, have recently gained significant attention for both scientific and…
Automated Discovery and Optimization of 3D Topological Photonic Crystals
Samuel Kim, Thomas Christensen, Steven G. Johnson +1
Topological photonic crystals have received considerable attention for their ability to manipulate and guide light in unique ways. They are typically designed by hand based on care…
Quasicrystalline Weyl points and dense Fermi-Bragg arcs
André Grossi e Fonseca, Thomas Christensen, John D. Joannopoulos +1
We introduce a general mechanism for obtaining Weyl points in a stack of 2D quasicrystals, which can be extended to any stack of aperiodic layers. We do so by driving a topological…
Surrogate- and invariance-boosted contrastive learning for data-scarce applications in science
Charlotte Loh, Thomas Christensen, Rumen Dangovski +2
Deep learning techniques have been increasingly applied to the natural sciences, e.g., for property prediction and optimization or material discovery. A fundamental ingredient of s…
Location and topology of the fundamental gap in photonic crystals
Thomas Christensen, Hoi Chun Po, John D. Joannopoulos +1
The fundamental, or first, band gap is of unmatched importance in the study of photonic crystals. Here, we address precisely where this gap can be opened in the band structure of t…
Control of quantum electrodynamical processes by shaping electron wavepackets
Liang Jie Wong, Nicholas Rivera, Chitraang Murdia +4
Fundamental quantum electrodynamical (QED) processes such as spontaneous emission and electron-photon scattering encompass a wealth of phenomena that form one of the cornerstones o…
Quantum Surface-Response of Metals Revealed by Acoustic Graphene Plasmons
P. A. D. Gonçalves, Thomas Christensen, N. M. R. Peres +5
A quantitative understanding of the electromagnetic response of materials is essential for the precise engineering of maximal, versatile, and controllable light--matter interaction…
Plasmon-Emitter Interactions at the Nanoscale
P. A. D. Gonçalves, Thomas Christensen, Nicholas Rivera +3
Plasmon-emitter interactions are of paramount importance in modern nanoplasmonics and are generally maximal at short emitter-surface separations. However, when the separation falls…
Maximal Spontaneous Photon Emission and Energy Loss from Free Electrons
Yi Yang, Aviram Massuda, Charles Roques-Carmes +7
Free electron radiation such as Cerenkov, Smith--Purcell, and transition radiation can be greatly affected by structured optical environments, as has been demonstrated in a variety…
Phonon polaritonics in two-dimensional materials
Nicholas Rivera, Thomas Christensen, Prineha Narang
Extreme confinement of electromagnetic energy by phonon polaritons holds the promise of strong and new forms of control over the dynamics of matter. To bring such control to the at…
A General Theoretical and Experimental Framework for Nanoscale Electromagnetism
Yi Yang, Di Zhu, Wei Yan +7
Local, bulk response functions, e.g permittivity, and the macroscopic Maxwell equations completely specify the classical electromagnetic problem, which features only wavelength …
Ab initio calculation of phonon polaritons in silicon carbide and boron nitride
Nicholas Rivera, Jennifer Coulter, Thomas Christensen +1
The ability to use photonic quasiparticles to control electromagnetic energy far below the diffraction limit is a defining paradigm in nanophotonics. An important recent developmen…
Dynamics and Spin-Valley Locking Effects in Monolayer Transition Metal Dichalcogenides
Christopher J. Ciccarino, Thomas Christensen, Ravishankar Sundararaman +1
Transition metal dichalcogenides have been the primary materials of interest in the field of valleytronics for their potential in information storage, yet the limiting factor has b…
Plasmonics in Argentene
Ravishankar Sundararaman, Thomas Christensen, Yuan Ping +4
Two-dimensional materials exhibit a fascinating range of electronic and photonic properties vital for nanophotonics, quantum optics and emerging quantum information technologies. M…
Magnetically-defined topological edge plasmons in edgeless electron gas
Dafei Jin, Yang Xia, Thomas Christensen +11
Topological materials bear gapped excitations in bulk yet protected gapless excitations at boundaries. Magnetoplasmons (MPs), as high-frequency density excitations of two-dimension…
Controlling light emission with electron wave interference
Chitraang Murdia, Nicholas Rivera, Thomas Christensen +4
It is a long standing question whether or not one can change the nature of spontaneous emission by a free electron through shaping the electron wavefunction. On one hand, shaping t…
Limits to the Optical Response of Graphene and 2D Materials
Owen D. Miller, Ognjen Ilic, Thomas Christensen +5
2D materials provide a platform for strong light--matter interactions, creating wide-ranging design opportunities via new-material discoveries and new methods for geometrical struc…
Infrared Topological Plasmons in Graphene
Dafei Jin, Thomas Christensen, Marin Soljačić +3
We propose a two-dimensional plasmonic platform - periodically patterned monolayer graphene - which hosts topological one-way edge states operable up to infrared frequencies. We cl…
Low-loss Plasmonic Dielectric Nanoresonators
Yi Yang, Owen D. Miller, Thomas Christensen +2
Material losses in metals are a central bottleneck in plasmonics for many applications. Here we propose and theoretically demonstrate that metal losses can be successfully mitigate…
Quantum corrections in nanoplasmonics: shape, scale, and material
Thomas Christensen, Wei Yan, Antti-Pekka Jauho +2
The classical treatment of plasmonics is insufficient at the nanometer-scale due to quantum mechanical surface phenomena. Here, an extension to the classical paradigm is reported w…