Title: Metal nanoparticle embedded and rare-earth doped novel glasses for photonic application

Biography:

Hamid-Reza Bahari is the Founder and Director of a private innovation center, CIGHTECH, focuses on generating innovative ideas, integrating collaborative team, discovering new talents, commercialization of high-tech products. He has experiences on photonic materials including novel photonic glass/ceramics, nanomaterials, plasmonic and rare-earth doped materials. He has held positions such as guest assistant professor of physics at Sharif University of Technology, Tehran, Iran, Marie Curie Research Fellow at Institute of Materials Research at Leeds University, UK, postdoc at Department of Physics at Middle East Technical University, Turkey, postdoc Institute of Microengineering and Nanoelectronics (IMEN) at National University of Malaysia (UKM), researcher at Integrated Ligthwave Research Group (ILRG) at University of Malaya. He has awarded PhD (photonic and plasmonic glasses) from Physics department of University Putra Malaysia (UPM), and also MSc and BSc on solid state physics from university of Tehran.

Abstract

In this talk, metal nanoparticle embedded novel glass, the concept of glassy network, the unusual physical properties of such materials, their fabrication challenges and their potential application in photonic, are generally introduced to the audiences. Photoluminescence of rare earth ions doped in glassy matrix can be enhanced by metal nanostructures dispersed in the active medium through local field enhancement and/or energy transfer. Surface Plasmon Resonance (SPR) arises from metallic nanoparticles results in giant and highly localized electric fields around nanoparticles. In addition to isotropic spherical NPs, optically coupled NPs and also anisotropic NPs with sharp edges by confinement of the local surface electric field at their sharp edges are fascinating for nanometal enhanced fluorescence (NMEF) studies. Although, fabrication and characterization of metal nanostructures embedded in glass matrices have been performed by many researchers, fabrication of non-spherical metallic nanostructures in glass matrices has had remarkably little success and remains a challenge. In this talk, the concept will also be delivering to the audiences through an example of matrix adjustment thermal reduction method of synthesis of silver nanostructures in Er3+/Yb3+ activated GeO2-PbO glass matrix. The main focus of this talk is on fabrication challenges, nano/glass material structure, and optical properties.