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Interfacing Individual Molecules and Nanofabrication

September 30, 2016 @ 12:00 pm - 1:00 pm

Ashwin Gopinath, a Postdoctoral Researcher from the California Institute of Technology, will be giving a talk regarding a lithographically directed technique for organizing bottom-up components within top-down fabricated devices.

Lunch will be served at 11:45 am. Please RSVP for lunch to Craig LaBoda (

Abstract: Conventional top-down nanofabrication, over the last six decades, has enabled almost all the complex electronic and optical devices around us. Parallely, bottom-up self-assembly processes within natural inorganic/organic nanostructures have also been studied extensively since they enable structures with properties unattainable by any top-down method. While both these fields have independently matured, ongoing efforts to create ”hybrid nanostructures” by combining the two has been fraught with technical challenges. The main roadblock is the absence of a scalable method to precisely organize components built bottom-up (like molecules, quantum dots or nanoparticles) within top-down nanofabricated devices.

In this talk, I will introduce a lithographically directed self-assembly technique as a possible solution to the aforementioned roadblock. The method primarily involves utilizing DNA origami, a technique to create arbitrary 2/3D DNA nanoparticles, as a modular adaptor to bridge the molecular and lithographic length scale. Additionally, as a proof of principle, the technique is used to organize discrete light emitters inside nanofabricated photonic crystal cavities (PCCs) for measuring as well as precisely controlling the optical properties of the PCCs. Lastly, I will discuss a couple of new devices enabled by this technique, the first is designed to study superradiant interaction between discrete rare earth ions embedded within a single optical resonator and the second enables highly multiplexed study of individual biomolecules.


September 30, 2016
12:00 pm - 1:00 pm


Gross Hall, Duke University
140 Science Drive
Durham, NC 27708 United States
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