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Electromagnetic waves under nonstationary conditions, the connection with parity-time symmetry and studies on resonant systems

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Optothermal shaping of lamb waves with square and spiral phase fronts

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We introduce a Lamb-wave medium with tunable propagation velocities, which are controlled by a two-dimensional heating pattern produced by a laser beam. We utilized it to demonstrate that waves in an appropriately designed medium can propagate in the form ...

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In this thesis, we unveil a third design path to manipulate elastic waves within architected media, distinct from the traditional phononic crystal and locally-resonant metamaterial concepts. The core innovation lies in the concept of nonlocal resonances, d ...

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This work presents the study of suspended Y-cut Lithium Niobate shear bulk acoustic resonators for wide band filter applications in the frequency range of 3.5-4.5GHz. The resonators consist of a Lithium Niobate film with Aluminum top interdigitated electro ...

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Dissipative phase transitions in n-photon driven quantum nonlinear resonators

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We investigate and characterize the emergence of finite-component dissipative phase transitions (DPTs) in nonlinear photon resonators subject to n-photon driving and dissipation. Exploiting a semiclassical approach, we derive general results on the occurre ...

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Infrastructures of Solidarity, Infrastructures of Totalitarism

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Between 11 September 1973 and 11 March 1990, the silenced voices of many were dissolved into electromagnetic waves so they could be transmitted and heard in Chile. For sixteen years, the broadcasting house of the German Democratic Republic (GDR) – the Funk ...

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Effect of mechanical nonlinearity on the electromagnetic response of a microwave tunable metamaterial

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Tunable metamaterials functionalities change in response to external stimuli. Mechanical deformation is known to be an efficient approach to tune the electromagnetic response of a deformable metamaterial. However, in the case of large mechanical deformatio ...

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Active Ferromagnetic Metasurface with Topologically Protected Spin Texture for Spectral Filters

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Electromagnetic metasurfaces modulate a material's response to electromagnetic waves by specifically arranged elements with dimensions below the wavelength. They have opened new fields of research, including flat optics and nanophotonics on a chip. Ferroma ...

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