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We show that non-Hermitian bipartite optical lattices display a spontaneous phase transition from a regime of entirely real spectrum to a complex one. This work broadens the scope of non-Hermitian optics beyond PT-symmetry.
We show that Čerenkov radiation contains new phenomena arising from the quantum nature of charged fermions. The charge's orbital angular momentum and spin couple to the emitted photon, which scatters into preferred angles and polarizations.
We present topological photonics in curved space. We use 1D waveguide lattices on curved surfaces, and show that the curvature of the surface induces topological phase transfer dynamics, Thouless pumping, localization and delocalization of waves.
We find the Cerenkov radiation emitted from charged particles carrying OAM in a cylindrical waveguide. The spectrum contains sharp resonances correlated to the particle's OAM, offering a novel spectroscopy method for OAM of charged particles.
We present the first topological laser: topologically-protected lasing in photonic honeycomb lattices. We show that the lasing modes are unidirectional and robust to defects.
We present the first PT-symmetric topological insulator system: topologically-protected transport of edge states in PT-symmetric photonic honeycomb lattices.
We show a novel technique to enhance resolution and SNR in electron microscopes-by shaping the quantum wavefunction of electrons. Our technique overcomes fundamental limits that currently set the resolution and SNR in electron microscopy.
We find the Cherenkov radiation emitted by vortex electrons, and show that a properly designed photonic waveguide can increase the angular momentum of the electrons. We calculate the selection rules in a relativistic quantum formalism.
We show that shaping the initial wavefunction of a multi-electron system can lead to electron beams displaying shape-preserving propagation in spite of the inherent repulsion among electrons. This idea suggests applications in microscopy and lithography.
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