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21
Date Added: May 1, 2021
Authors: Ravitej Uppu, Manashee Adhikary, Cornelis A. M. Harteveld, Willem L. Vos
Date Added: May 1, 2021
Authors: Ravitej Uppu, Manashee Adhikary, Cornelis A. M. Harteveld, Willem L. Vos
It is well known that waves with frequencies within the forbidden gap inside a crystal are transported only over a limited distance—the Bragg length—before being reflected by Bragg interference. Here, we demonstrate how to send waves much deeper into crystals in an exemplary study of light in two-dimensional silicon photonic crystals. By spatially shaping the wave fronts, the internal energy density—probed via the laterally scattered intensity—is enhanced at a tunable distance away from the front surface. The intensity is up to 100× enhanced compared to random wave fronts, and extends as far as 8× the Bragg length, which agrees with an extended mesoscopic model. We thus report a novel control knob for mesoscopic wave transport that pertains to any kind of waves.
3
Date Added: May 3, 2021
Authors: Nikolov, Daniel K., et al
Date Added: May 3, 2021
Authors: Nikolov, Daniel K., et al
The demand for high-resolution optical systems with a compact form factor, such as augmented reality displays, sensors, and mobile cameras, requires creating new optical component architectures. Advances in the design and fabrication of freeform optics and metasurfaces make them potential solutions to address the previous needs. Here, we introduce the concept of a metaform—an optical surface that integrates the combined benefits of a freeform optic and a metasurface into a single optical component. We experimentally realized a miniature imager using a metaform mirror. The mirror is fabricated via an enhanced electron beam lithography process on a freeform substrate. The design degrees of freedom enabled by a metaform will support a new generation of optical systems. A miniature imager is demonstrated using a metaform—a rotationally variant optic with an integrated metasurface. A miniature imager is demonstrated using a metaform—a rotationally variant optic with an integrated metasurface.
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1
Date Added: Apr 30, 2021
Authors: Hemnath Anandan Kumar, Senthilkumaran Kumaraguru, CP Paul, KS Bindra
Date Added: Apr 30, 2021
Authors: Hemnath Anandan Kumar, Senthilkumaran Kumaraguru, CP Paul, KS Bindra
1
Date Added: Apr 30, 2021
Authors: Yaowen Wu, Guangyi Zhang, Jianxin Wang, Yang Chao, Wenwu Zhang
Date Added: Apr 30, 2021
Authors: Yaowen Wu, Guangyi Zhang, Jianxin Wang, Yang Chao, Wenwu Zhang
1
Date Added: Apr 30, 2021
Authors: Daniele Dipasquale, Stefano Debei, Gabriele Cremonese, Fabrizio Capaccioni, Pasquale Palumbo
Date Added: Apr 30, 2021
Authors: Daniele Dipasquale, Stefano Debei, Gabriele Cremonese, Fabrizio Capaccioni, Pasquale Palumbo
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