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We report on the fabrication and investigation of pyramidal GaAs micro-cavities on top of a Bragg mirror. A finite-difference time-domain simulation supports the experimentally found optical mode structure for such a cavity shape.
We measure the absolute extinction cross section spectra of individual split-ring resonators (fundamental magnetic resonance at 1.4-mum wavelength). The experiments are compared with a simple electric-circuit model and with microscopic calculations.
We fabricate planar magnetic photonic metamaterials via direct laser writing and silver chemical vapor deposition, an approach, which is also suitable for three-dimensional structures. Retrieval of the effective metamaterial parameters reveals the importance of bi-anisotropy.
We present a detailed understanding of mechanical dissipation in toroidal microresonators enabling the design of novel structures that combine ultra-high optical Q(>108) and mechanical Q exceeding 50psila000 at frequencies above 20 MHz at room temperature.
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