Date: Tuesday, February 11, 2014
Time: 11:00 am
Speaker: Dr. Hou-Tong Chen, Center for Integrated Nanotechnologies, LANL
Title: Terahertz Metamaterials – Structure Design, Material Integration and Emergent Functionality
Location: 67-3111 Chemla Room
The control of electromagnetic radiation lies at the core of many modern technologies. Naturally occurring materials provide only limited electromagnetic response, insufficient for emerging technologies with increasingly demanding requirements. During the past decade metamaterials have been developed to accomplish many exotic phenomena and functionalities that are otherwise difficult or impossible to realize. In this talk, I will introduce the concept of metamaterials which have greatly expanded our scientific understanding of electromagnetic phenomena and effective material properties. Particular focus will be our recent series of works in few-layered ultrathin planar metamaterials that can accomplish fascinating functionalities including arbitrary control of reflection and diffraction, absorption and emission, phase and amplitude dispersion, and state of polarization. I will further discuss that enhanced and active functionalities can be accomplished through the integration of functional materials in metamaterial structures enabling strong light-matter interactions. The discussed works are mainly in the terahertz frequency range where metamaterials can make major contribution in solving the materials issues that have prevented the development of terahertz devices and components for many promising applications.