Terahertz Modulation of Hexagonal-Shaped Metamaterials Employing ZnO Quantum Dots

Structural and Optical Characterization of ZnO-Graphene Nanocomposite Quantum Dots

In this research, zinc oxide quantum dots and graphene nanocomposites were synthesized via two different methods; In the first (direct) method, ZnO-graphene Nanocomposites were made mixing the synthesized zinc oxide and graphene. In the second (indirect) method, zinc nitrate, graphene, and sodium hydroxide were used to made ZnO-graphene Nanocomposites. XRD, FTIR and Raman spectroscopy analyses ...

Terahertz Metamaterials for Modulation and Detection

This paper reviews recent work in the area of active metamaterials where transistors and circuitry are embedded within metamaterial structures for novel functions. In one function, embedding of psuedomorphic high electron mobility transistor (pHEMT) within the metamaterial resonator allows realization of a terahertz modulator. A variation of this approach utilizes diodes to modulate the metamat...

Properties of GaN and ZnO Quantum Dots

Photo-generated metamaterials induce modulation of CW terahertz quantum cascade lasers

Periodic patterns of photo-excited carriers on a semiconductor surface profoundly modifies its effective permittivity, creating a stationary all-optical quasi-metallic metamaterial. Intriguingly, one can tailor its artificial birefringence to modulate with unprecedented degrees of freedom both the amplitude and phase of a quantum cascade laser (QCL) subject to optical feedback from such an anis...

Corrigendum: Photo-generated metamaterials induce modulation of CW terahertz quantum cascade lasers

The original version of this Article contained a typographical error in the spelling of the author Alessandro Ciattoni which was incorrectly given as Alessardro Ciattoni. This has now been corrected in the PDF and HTML versions of the Article. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are includ...