Numerical transport calculations show topological corner states in a modified Kane-Mele SOTI mediate perfect Andreev reflection near zero energy via resonant tunneling, with tunable antiresonance dips.
Ezawa, Higher-order topological insulators and semimetals on the breathing kagome and pyrochlore lattices, Phys
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Numerical evolution of the BBH model with controlled gain shows stable lasing modes are set by topological corner and edge states, with new ratios τ1, τ2, and χ that jump at phase transitions when the hopping ratio γ/λ is varied.
Quasi-periodic driving of a four-level system creates temporal analogs of quantum spin Hall and higher-order topological insulators, yielding quantized energy exchange rates between drives due to synthetic edge or corner modes.
Analytical expressions and existence criteria for higher-order topological corner and edge states in two-dimensional kagome and square grid-like beam frames are presented.
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Nonlinear topological laser based on multipole insulators
Numerical evolution of the BBH model with controlled gain shows stable lasing modes are set by topological corner and edge states, with new ratios τ1, τ2, and χ that jump at phase transitions when the hopping ratio γ/λ is varied.