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Spawning rings of exceptional points out of Dirac cones
TLDR
The results indicate that the radiation existing in any open system can fundamentally alter its physical properties in ways previously expected only in the presence of material loss and gain.
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Shrinking light to allow forbidden transitions on the atomic scale
TLDR
This theory reveals that conventionally forbidden light-matter interactions—such as extremely high-order multipolar transitions, two-plasmon spontaneous emission, and singlet-triplet phosphorescence processes—can occur on very short time scales comparable to those of conventionally fast transitions.
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Subwavelength multilayer dielectrics: ultrasensitive transmission and breakdown of effective-medium theory.
We show that a purely dielectric structure made of alternating layers of deep subwavelength thicknesses exhibits novel transmission effects which completely contradict conventional effective medium…
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Nondiffracting accelerating wave packets of Maxwell's equations.
TLDR
It is emphasized that in their scalar form, these beams are the exact solutions for nondispersive accelerating wave packets of the most common wave equation describing time-harmonic waves, which has profound implications to many linear wave systems in nature.
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Abruptly Focusing and Defocusing Needles of Light and Closed-Form Electromagnetic Wavepackets
Fourier optics enforces a trade-off between length and narrowness in electromagnetic wavepackets, so that a narrow spatial focus diffracts at a large divergence angle, and only infinitely wide beams…
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Efficient plasmonic emission by the quantum Čerenkov effect from hot carriers in graphene
TLDR
The interaction between the charge carriers flowing inside graphene and the plasmons enables a highly efficient two-dimensional Čerenkov emission, giving a versatile, tunable and ultrafast conversion mechanism from electrical signal to plasmonic excitation.
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Self-accelerating self-trapped optical beams.
We present self-accelerating self-trapped beams in nonlinear optical media, exhibiting self-focusing and self-defocusing Kerr and saturable nonlinearities, as well as a quadratic response. In Kerr…
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Coherent interaction between free electrons and a photonic cavity
TLDR
The strong interaction of coherent free electrons with a photonic-crystal cavity enables the measurement of the lifetimes of the cavity modes and provides a technique for multidimensional near-field imaging and spectroscopy of free-electron interactions with photonic cavities.
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All-angle negative refraction of highly squeezed plasmon and phonon polaritons in graphene–boron nitride heterostructures
TLDR
It is revealed that the strong coupling between plasmon and phonon polaritons in graphene–BN heterostructures can be used to flip the sign of the group velocity of the resulting hybrid (plasmon–phonon–polariton) modes.
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Light–matter interactions with photonic quasiparticles
Interactions between light and matter play an instrumental role in spectroscopy, sensing, quantum information processing and lasers. In most of these applications, light is considered in terms of…
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