Visible to the public Biblio

Filters: Keyword is Optical device fabrication  [Clear All Filters]
2020-07-20
Marakis, Evangelos, van Harten, Wouter, Uppu, Ravitej, Vos, Willem L., Pinkse, Pepijn W. H..  2017.  Reproducibility of artificial multiple scattering media. 2017 Conference on Lasers and Electro-Optics Europe European Quantum Electronics Conference (CLEO/Europe-EQEC). :1–1.
Summary form only given. Authentication of people or objects using physical keys is insecure against secret duplication. Physical unclonable functions (PUF) are special physical keys that are assumed to be unclonable due to the large number of degrees of freedom in their manufacturing [1]. Opaque scattering media, such as white paint and teeth, comprise of millions of nanoparticles in a random arrangement. Under coherent light illumination, the multiple scattering from these nanoparticles gives rise to a complex interference resulting in a speckle pattern. The speckle pattern is seemingly random but highly sensitive to the exact position and size of the nanoparticles in the given piece of opaque scattering medium [2], thereby realizing an ideal optical PUF. These optical PUFs enabled applications such as quantum-secure authentication (QSA) and communication [3, 4].
2018-08-23
Keeler, G. A., Campione, S., Wood, M. G., Serkland, D. K., Parameswaran, S., Ihlefeld, J., Luk, T. S., Wendt, J. R., Geib, K. M..  2017.  Reducing optical confinement losses for fast, efficient nanophotonic modulators. 2017 IEEE Photonics Society Summer Topical Meeting Series (SUM). :201–202.

We demonstrate high-speed operation of ultracompact electroabsorption modulators based on epsilon-near-zero confinement in indium oxide (In$_\textrm2$$_\textrm3$\$) on silicon using field-effect carrier density tuning. Additionally, we discuss strategies to enhance modulator performance and reduce confinement-related losses by introducing high-mobility conducting oxides such as cadmium oxide (CdO).