The Excitonics and Photonics (ExP) group envisions optoexcitonic circuits as a plausible solution to the current limited energy efficient, hybridized photon-electron communication technology. This vision drives a collaborative multidisciplinary research at ExP lab to bridge knowledge and cutting edge approaches from the fields of photonics, excitonics and material science. The group is involved in research spanning from engineering optical interconnects and excitonics devices, material synthesis, all the way to developing the fundamental understanding of the physics governing the operation of such devices.
As the industry struggles to keep up with Moore’s law, different device technologies have been reported and currently being explored. However, most of the technologies fail at integrating with a photon, which is an efficient medium for communication. Excitons on the other hand can seamlessly transform to and from a photon and the ability to manipulate them will make us contemplate optoexcitonic circuits, beyond their present limited application in energy conversion devices. I also believe that the research from the ExP lab will be directly beneficial in the area of life sciences, especially in biochemical sensing. Biochemical sensors based on excitons have a non-linear transport response (gain) triggered by the analyte, enabling improved signal to noise ratio.
Potential excitonic materials of interest are monolayer transition metal dichalcogenides (TMD) as well as molecular organic dye thin films. While both material systems support room temperature excitons, TMD’s have an added advantage of much higher exciton mobility when compared to organics. Through our work, we hope to advance the knowledge of the underlying physics of exciton transport and engineer optical interconnects to develop energy efficient communication, processing and sensing devices.
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– Parag B. Deotare