Broadband Holography via Structured Black Silicon Nano-Antennas

Mohammed Sait, Valerio Mazzone, Andrea Fratalocchi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Computer-generated holograms have wide applications in different fields of optics, ranging from imaging, data storage, to security.Herein, we report a new method for the fabrication of large-scale computer-generated holograms from an inexpensive material, such as Silicon. Our approach exploits dry etching to create a series of broadband nanoantennas, which can tune the reflectivity of Si from an average of 0.35 to 0.1 in the entire visible range. We demonstrated the realisation of different images at wavelengths of 450 nm, 532 nm, and 632 nm with an efficiency of 10%, 14%, and 12%, respectively, thus opening up the application of large-scale broadband computer-generated holographic surfaces.
Original languageEnglish (US)
Pages (from-to)1378
JournalApplied Sciences
Volume9
Issue number7
DOIs
StatePublished - Apr 1 2019

Fingerprint Dive into the research topics of 'Broadband Holography via Structured Black Silicon Nano-Antennas'. Together they form a unique fingerprint.

Cite this