Articles by Spencer Novak in JoVE
Düzgün kalınlığı Ge Elektro Biriktirme Spencer Novak1, Pao-Tai Lin2,3, Cheng Li4, Nikolay Borodinov1, Zhaohong Han5, Corentin Monmeyran5, Neil Patel5, Qingyang Du5, Marcin Malinowski4, Sasan Fathpour4, Chatdanai Lumdee4, Chi Xu4, Pieter G. Kik4, Weiwei Deng6, Juejun Hu7, Anuradha Agarwal7, Igor Luzinov1, Kathleen Richardson4 1Department of Materials Science and Engineering, Clemson University, 2Department of Materials Science and Engineering, Texas A&M University, 3Department of Electrical and Computer Engineering, Texas A&M University, 4College of Optics and Photonics, Center for Research and Education in Optics and Lasers (CREOL), University of Central Florida, 5Department of Materials Science and Engineering, Massachusetts Institute of Technology, 6Department of Mechanical Engineering, Virginia Polytechnic Institute, 7Microphotonics Center, Massachusetts Institute of Technology
Other articles by Spencer Novak on PubMed
Heterogeneous Microring and Mach-Zehnder Modulators Based on Lithium Niobate and Chalcogenide Glasses on Silicon Optics Express. Aug, 2015 | Pubmed ID: 26368243 Thin films of lithium niobate are wafer bonded onto silicon substrates and rib-loaded with a chalcogenide glass, Ge(23)Sb(7)S(70), to demonstrate strongly confined single-mode submicron waveguides, microring modulators, and Mach-Zehnder modulators in the telecom C band. The 200 μm radii microring modulators present 1.2 dB/cm waveguide propagation loss, 1.2 × 10(5) quality factor, 0.4 GHz/V tuning rate, and 13 dB extinction ratio. The 6 mm long Mach-Zehnder modulators have a half-wave voltage-length product of 3.8 V.cm and an extinction ratio of 15 dB. The demonstrated work is a key step towards enabling wafer scale dense on-chip integration of high performance lithium niobate electro-optical devices on silicon for short reach optical interconnects and higher order advanced modulation schemes.
Low-loss Photonic Device in Ge-Sb-S Chalcogenide Glass Optics Letters. Jul, 2016 | Pubmed ID: 27367109 Low-loss waveguides constitute an important building block for integrated photonic systems. In this work, we investigated low-loss photonic device fabrication in Ge23Sb7S70 chalcogenide glass using electron beam lithography followed by plasma dry etching. High-index-contrast waveguides with a low propagation loss of 0.5 dB/cm and microdisk resonators with an intrinsic quality factor (Q-factor) of 1.2×106 were demonstrated. Both figures represent, to the best of our knowledge, the best low-loss results reported thus far in submicrometer single-mode chalcogenide glass devices.