Abstract: Non-resonant acoustic meta-material, method of fabrication, and uses thereof are disclosed herein. A layer of a first material is formed on a first substrate. A layer of a second material is formed on the layer of the first material to produce a stacked layer of first and second materials. At least a portion of the stacked layer of first and second materials is exposed to a radiation. The exposed portion of the second material is removed from the stacked layer of first and second materials. A cavity is formed using the removed exposed portion of the second material. The cavity includes a membrane formed from at least a portion of the first material. Additionally, an ultrasound system includes an ultrasound transducer and the non-resonant acoustic metamaterial coupled to the ultrasound transducer.

Abstract: A composite film structure having a first absorbing layer comprising a first material, a second absorbing layer comprising a second material, and a first collector layer disposed between the first absorbing layer and the second absorbing layer, wherein the first absorbing layer has a thickness that is less than a diffusion length of a photocarrier of the first material, and wherein the second absorbing layer has a thickness that is less than a diffusion length of a photocarrier of the second material.