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  • Ryan D. Pensack: DNA-Assembled Dye Aggregates as Possible Materials for Quantum Information Science

Ryan D. Pensack: DNA-Assembled Dye Aggregates as Possible Materials for Quantum Information Science

    College of Science and Technology

    Materials composed of conjugated organic molecules (i.e., dyes) mediate energy conversion essential to life on earth, such as in photosynthesis, and have the potential to open up bottlenecks in quantum information science (QIS). For example, superconductors, which are current state-of-the-art materials in QIS, only function at extremely cold temperatures owing, in part, to weak interaction strengths giving rise to superpositions and concomitant small beat frequencies. Other materials, such as dye aggregates featuring molecular excitons, exhibit larger interaction strengths, larger beat frequencies, and thus may potentially function at higher temperatures. In this talk, I will discuss our efforts examining the feasibility of DNA-assembled dye aggregates as materials for QIS. First, I will describe the advantages of using DNA as a scaffold for dye aggregation, including how it may be used to tailor the dye aggregate environment and overcome a generally problematic collective effect called aggregation-induced quenching. Next, I will discuss our work toward characterizing the difference dipole of a dye, whose magnitude governs bi-exciton interactions, along with the impact of the difference dipole on other important properties such as excited-state lifetime. Lastly, I will present recent work indirectly characterizing single-exciton coherence, and similar work toward directly characterizing this important property of dye aggregates. In addition to the new fundamental knowledge we have generated, we continue to make critical progress toward addressing the feasibility of DNA-assembled dye aggregates in QIS.

     

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    Additional Info

    Created By: College of Science and Technology
    Sponsors: CST Department of Chemistry
    Open To: Faculty and Staff // Undergraduate Students // Graduate Students
    Intended Audience: CST Chemistry students
    Type: Lecture
    Tags: CST Department of Chemistry

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