Large-scale, electronically reconfigurable photonic integrated circuits (PICs) can enable programmable gate array (PGA) to realize extremely fast, arbitrary linear operations, with potential applications in classical and quantum optical information technology. The basic building blocks of existing PGAs are thermally tunable broadband Mach-Zehnder-Interferometers, which pose several limitations in size, power, and scalability. Phase change materials (PCMs) exhibiting a significant nonvolatile change in the refractive index can potentially transform these devices, providing at least one order of magnitude reduction in the device size, zero static energy consumption, and minimal cross-talk.
In this webinar hosted by the Optics in Digital Systems Technical Group, Arka Majumdar will discuss different PCMs that can be used in conjunction with silicon and silicon nitride photonics to create reconfigurable optical switches for visible and infrared wavelengths. Dr. Majumdar will also discuss different heaters needed to actuate the phase transitions on-chip.
Subject Matter Level: Intermediate - Assumes basic knowledge of the topic
What You Will Learn:
• Gas-phase fluorescence spectroscopy using ultrashort laser pulses
• Applications of femtosecond imaging methods for chemically reacting flows
• Opportunities and challenges in laser imaging diagnostics in harsh environments such as gas turbine engines and hypersonic flight systems development
Who Should Attend:
• Students, postdocs, and young professionals
• Experienced researchers in gas-phase spectroscopy and laser diagnostics