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Electromagnetics and Photonics Commons™
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Full-Text Articles in Electromagnetics and Photonics
Controlling Light With Metadevices, Xu Zhang
Controlling Light With Metadevices, Xu Zhang
Dissertations, Master's Theses and Master's Reports
The development of metamaterials provides a new way to manipulate electromagnetic waves by sub-wavelength artificial structures, and hence brings new properties and functionalities that cannot be found with conventional materials. This leads to the possibility of previously unthought-of applications, including perfect lenses, invisibility cloaks, and perfect absorbers. However, several critical challenges need to be addressed before transiting from intriguing scientific findings to real-world usable devices.
This dissertation deals with two challenges regarding the practical use of metamaterials. Firstly, fabrication of truly three-dimensional (3D) and large-scale metamaterials is needed to increase the degrees of freedom of the functionality for device level …
Linear Ring Resonator Modulator For Microwave Photonic Links, Arash Hosseinzadeh
Linear Ring Resonator Modulator For Microwave Photonic Links, Arash Hosseinzadeh
Dissertations, Master's Theses and Master's Reports
Modulators within Microwave photonic links (MPLs) encode Radio Frequency (RF) signal information to the optical domain for transmission in applications such as wireless access networks and antenna remoting exploiting advantages optical fiber offers over RF coaxial cables including bandwidth, loss, size, weight, and immunity to electromagnetic interference. A critical figure-of-merit in MPLs is spur-free-dynamic-range (SFDR) defining the range of RF signal power a MPL transmits without distortion. Current Mach-Zehnder Interference (MZI) modulators used in MPLs limit the SFDR because of the associated nonlinear sinusoidal transfer function.
A rigorous theoretical method is developed followed by design, fabrication, and testing to investigate …