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physics.class-ph2016★ 122 cited
Non-Hermitian Acoustic Metamaterials: the role of Exceptional Points in sound absorption
V. Achilleos, G. Theocharis, O. Richoux +1
Effective non-Hermitian Hamiltonians are obtained to describe coherent perfect absorbing and lasing boundary conditions. PT -symmetry of the Hamiltonians enables to design configur…
physics.class-ph2016★ 39 cited
Coherent Perfect Absorption induced by the nonlinearity of a Helmholtz resonator
V. Achilleos, O. Richoux, G. Theocharis
In this work, we analytically report Coherent Perfect Absorption induced by the acoustic nonlinear response of a Helmholtz Resonator side loaded to a waveguide. In particular, we s…