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10.1038/ncomms14608 http://scihub22266oqcxt.onion/10.1038/ncomms14608 C5333366!5333366!28240283     free     free     free       Nat+Commun 2017 ; 8 (ä): ä Nephropedia Template TP {{tp|p=28240283|t=2017. Metamaterial bricks and quantization of meta-surfaces |pdf=|usr=}}{{28240283}} gab.com Text Metamaterial bricks and quantization of meta-surfaces JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=28240283 #FOAvip Controlling acoustic fields is crucial in diverse applications such as loudspeaker design, ultrasound imaging and therapy or acoustic particle manipulation. The current approaches use fixed lenses or expensive phased arrays. Here, using a process of analogue-to-digital conversion and wavelet decomposition, we develop the notion of quantal meta-surfaces. The quanta here are small, pre-manufactured three-dimensional units?which we call metamaterial bricks?each encoding a specific phase delay. These bricks can be assembled into meta-surfaces to generate any diffraction-limited acoustic field. We apply this methodology to show experimental examples of acoustic focusing, steering and, after stacking single meta-surfaces into layers, the more complex field of an acoustic tractor beam. We demonstrate experimentally single-sided air-borne acoustic levitation using meta-layers at various bit-rates: from a 4-bit uniform to 3-bit non-uniform quantization in phase. This powerful methodology dramatically simplifies the design of acoustic devices and provides a key-step towards realizing spatial sound modulators. Twit Text FOAVip Metamaterial bricks and quantization of meta-surfaces ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=28240283 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=28240283 #FOAvip English Wikipedia <ref>{{Cite pmid|28240283}}</ref> Metamaterial bricks and quantization of meta-surfaces #MMPMID28240283 Memoli G; Caleap M; Asakawa M; Sahoo DR; Drinkwater BW; Subramanian S Nat Commun 2017[]; 8 (ä): ä PMID28240283show ga Controlling acoustic fields is crucial in diverse applications such as loudspeaker design, ultrasound imaging and therapy or acoustic particle manipulation. The current approaches use fixed lenses or expensive phased arrays. Here, using a process of analogue-to-digital conversion and wavelet decomposition, we develop the notion of quantal meta-surfaces. The quanta here are small, pre-manufactured three-dimensional units?which we call metamaterial bricks?each encoding a specific phase delay. These bricks can be assembled into meta-surfaces to generate any diffraction-limited acoustic field. We apply this methodology to show experimental examples of acoustic focusing, steering and, after stacking single meta-surfaces into layers, the more complex field of an acoustic tractor beam. We demonstrate experimentally single-sided air-borne acoustic levitation using meta-layers at various bit-rates: from a 4-bit uniform to 3-bit non-uniform quantization in phase. This powerful methodology dramatically simplifies the design of acoustic devices and provides a key-step towards realizing spatial sound modulators. äMetamaterial bricks and quantization of meta-surfaces (epmc).pdf DeepDyve Pubget Overpricing