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.
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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.
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Higher-order topological corner states and edge states in grid-like frames
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.