Webexploited to design thin sound absorbers at deep subwavelength frequencies. In this work, we show that the combination of the slow sound conditions with the space-coiling and/or coupled-resonator mechanisms allows further reducing the panel thickness and overcoming the narrow-band performance imposed by the resonant nature of the wave dispersion. Web3 Nov 2015 · We present an ultrabroadband thin-film infrared absorber made of sawtoothed anisotropic metamaterial. Absorptivity of higher than 95% at normal incidence is supported in a wide range of frequencies, where the full absorption width at half-maximum is about 86%. ... Optical spectroscopy of these subwavelength antennas displays pronounced ...
Experimental verification of metamaterial based subwavelength …
Web28 Nov 2024 · The proposed work enumerates a hybrid thin, deep-subwavelength (2 cm) acoustic metamaterials acting as a completely new type of sound absorber, showing multiple broadband sound absorption... Web16 Sep 2016 · WASHINGTON, D.C., September 20, 2016 — When it comes to low-frequency sound waves, traditional sound-absorbing materials tend to be undesirably bulky, heavy or … highest resolution smartphone display
Prince Bawuah - Research Associate - University of Cambridge
Web9 Aug 2024 · ABSTRACT A structure for an underwater sound absorber with subwavelength thickness and a quasi-perfect absorption property at multiple frequency bands is reported. … Web3 Oct 2024 · Hyperbolic media exhibit unparalleld properties, e.g, as light absorbers in photovoltaics and photonics, as superlenses in farfield imaging, as subwavelength light concentrators in nanolithography, or as novel materials in emission engineering. With the advent of optical metamaterials, deliberate design of material properties became possible. WebA novel route to achieve a narrowband free-space electromagnetic absorber in any range of the spectrum based on stacked subwavelength hole arrays is proposed. The absorption is obtained by means of a slow light mode inside a fishnet-like engineered structure and exploiting the unavoidable misalignments and bucklings of the free-standing stack. highest resolution satellite maps