OSC Colloquium: Andrea Armani, "Organic Small Molecule Integrated Photonic Devices"

April 6, 2022
Andrea Armani
Title: Organic Small Molecule Integrated Photonic Devices 
 
Abstract(s): 
The initial, landmark integrated photonic devices relied on silicon and III-V materials, and recent advances in material fabrication and deposition methods have enabled a plethora of new technologies based on materials with higher optical nonlinearities, including 2D materials and organic polymers. However, nonlinear optical (NLO) organic small molecules have not experienced similar growth due to a perceived environmental instability and to challenges related to intra and intermolecular interactions. Because NLO small molecules have NLO coefficients that are orders of magnitude larger than conventional optical materials, developing strategies to fabricate optical devices could enable significant performance improvements. In recent work, we combined conventional top-down fabrication methods with bottom-up techniques (surface chemistry and self-assembly methods) to develop on-chip optical devices that incorporate NLO optical small molecules and optically-triggerable molecules. These hybrid systems provide access to optical behavior and performance not attainable with conventional material systems. In this seminar, I will discuss a couple examples of NLO small molecule integrated resonators, including Raman lasers and all optically-switchable devices.​ 
 
Speaker Bio(s): 
Andrea Armani is currently the Vice Dean of New Initiatives in the Viterbi School of Engineering, the Ray Irani Professor of Chemical Engineering and Materials Science, and the Director of the John D. O’Brien Nanofabrication Laboratory at the University of Southern California. Her research focuses on the development of new optical materials for integrated photonics with applications in quantum communications and healthcare. She received her BA in physics from the University of Chicago and her PhD in applied physics with a minor in biology from the California Institute of Technology. She has received several awards, including the ONR Young Investigator Award, the PECASE, the NIH Director’s New Innovator Award, and she was named a Young Global Leader by the World Economic Forum. In addition, her dedication to mentoring has been recognized with the USC Mellon Mentoring Award for Undergraduate Mentoring and the Hanna Reisler Award for Mentoring. She is the Feature Editor of Optics Letters and a Fellow of Optica, SPIE, AAAS, and NAI. 
 

 

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Past Speakers

donna strickland colloquium
3:30 – 5 p.m., Dec. 5, 2024

OSC Colloquium: Donna Strickland, "High Intensity Fiber lasers for Nonlinear Optics"

Ti:sapphire lasers offer the largest bandwidths and therefore the shortest pulses.   The highest laser intensities have been achieved using Chirped Pulse Amplification (CPA) of large diameter solid state lasers.  CPA was needed to avoid damage from the nonlinear process of self-focusing.  The disadvantage of solid-state lasers is the limited average power.  On the other hand, diode pumped fiber laser systems offer significantly higher average power than solid state lasers. Self-focusing is eliminated in single mode fibers by guiding and so nonlinear optics can be beneficial rather than detrimental and used to broaden the gain bandwidth.  Single fiber laser amplifiers will not reach the highest intensities offered by solid state lasers, but in this talk, I will discuss developing fiber laser amplifiers for nonlinear optical interactions such as mid-infrared generation and laser acceleration of electrons that require high intensity and benefit from high average power.
Hendra Nurdin
3:30 – 5 p.m., Nov. 21, 2024

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