Browsing by Author "Ferry, Vivian E"

Now showing 1 - 5 of 5
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    Data for Chiral Optical Properties of Metasurfaces Comprised of Chiral Media: Effects of Geometric and Material Chirality
    (2024-07-15) Ramamurthy, Maya; Cote, Bryan M; Ferry, Vivian E; veferry@umn.edu; Ferry, Vivian E; Department of Chemical Engineering and Materials Science, University of Minnesota
    Chiral nanomaterials and metamaterials are the subject of intense recent interest, but the principles that govern their design can be challenging to identify. With the emergence of a host of new chiral molecules and nanocrystals, metamaterials can be created from materials that are intrinsically chiral, potentially enhancing chiroptical properties by combining geometrical and material factors. To take advantage of this, we first need to deconvolute the distinct and sometimes competing effects of geometric and material chirality on chiroptical properties. Here, we investigate the role of the meta-atom geometry, optical resonances, and chirality of the constituent medium on the optical chirality enhancement, circular dichroism (CD), g-factor, and relative transmission of LCP versus RCP light (∆T) in metasurfaces comprised of chiral material. We find that overlapping Mie-like resonances in nanodisk arrays lead to 6-fold CD enhancement compared to a uniform film. Our analysis also suggests that making the medium chiral does not necessarily increase CD or g-factor; enhancement in the CD and optical chirality depend on the magnitude of the Pasteur parameter as well as its real and imaginary components. As a demonstration of how geometric and material chirality can be combined to enhance chiroptical properties, we design a geometrically chiral meta-atom out of chiral media and observe over 9-fold enhancement in both CD and g-factor compared to a metasurface comprised of achiral material. This work systematically investigates different approaches to tailoring a chiral response from nanostructured arrays and provides design rules that can be broadly applied to metastructures comprised of chiral media.
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    Data for Doping- and Strain-Dependent Electrolyte-Gate-Induced Perovskite to Brownmillerite Transformation in Epitaxial La1−xSrxCoO3−δ Films
    (2021-11-17) Chaturvedi, Vipul; Postiglione, William M; Chakraborty, Rohan D; Yu, Biqiong; Tabiś, Wojciech; Hameed, Sajna; Biniskos, Nikolaos; Jacobson, Andrew; Zhang, Zhan; Zhou, Hua; Greven, Martin; Ferry, Vivian E; Leighton, Chris; leighton@umn.edu; Leighton, Chris; Chemical Engineering and Materials Science, University of Minnesota; AGH University of Science and Technology, Faculty of Physics and Applied Computer Science; Advanced Photon Source, Argonne National Laboratory; School of Physics and Astronomy, University of Minnesota
    Electrolyte-gate-induced perovskite to brownmillerite transformations in La1-xSrxCoO3-d (LSCO) has been shown to be a facile technique to toggle between disparate electronic and magnetic phases in a single perovskite oxide thin film. Here we study the doping (Sr concentration), and strain (epitaxially imparted from the substrate) dependence of this topotactic transformation in LSCO thin films across almost the entire phase diagram. This repository page serves as a place to store the Figure plots and raw data from the cited publication.
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    Raw Data and Code for Optical Approaches for Passive Thermal Management in c-Si Photovoltaic Modules
    (2021-01-08) Slauch, Ian M; Deceglie, Michael G; Silverman, Timothy J; Ferry, Vivian E; veferry@umn.edu; Ferry, Vivian E; Ferry Group, University of Minnesota (Slauch and Ferry), National Renewable Energy Laboratory, Golden, CO (Deceglie and Silverman)
    These data comprise the raw experimental and simulation results of, and the computer code written to support, the work described in the manuscript "Optical Approaches for Passive Thermal Management in c-Si Photovoltaic Modules" submitted by the listed authors to the publication Joule, and are here submitted in accordance with the data archiving policy of the journal. These data contain primarily results from the third-party ray tracing software "SunSolve" published by PVLighthouse (www.pvlighthouse.au) and results from the finite-element simulation software "TOMCAT", published by the National Renewable Energy Laboratory (https://github.com/NREL/pv_tomcat). Additionally, the code written as a part of this work (MATLAB) has been provided.
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    Supporting Data for Design Guidelines for Luminescent Solar Concentrator Greenhouses in the United States
    (2024-11-21) Loh, Kristine Q; Harbick, Kale; Eylands, Nathan J; Kortshagen, Uwe R; Ferry, Vivian E; veferry@umn.edu; Ferry, Vivian E
    Agrivoltaic greenhouses combine controlled environment agriculture and photovoltaics in one plot of land to simultaneously address the global challenges of renewable energy and sustainable food production. Luminescent solar concentrators (LSCs) can benefit these systems by providing additional design flexibility, granting the ability to tune light transmission for plant growth while generating electricity. Herein, we determine design guidelines for the implementation of LSCs in agrivoltaic greenhouses given the two competing priorities of light used for crop yield or for energy generation. Using a comprehensive model, we evaluate the impact of LSC design choices on the greenhouse environment, energy generation, crop yield, and economic value in 48 locations across the contiguous United States. We show the PV coverage ratio and the greenhouse’s heating demands determine the energy offset provided by the LSC. For improving crop yield, luminophore selection should maximize transmitted red light. We demonstrate the sensitivity of the economic value to crop yield, thus dictating luminophore selection for optimizing plant growth. Based on current project technology costs, LSC greenhouses are as profitable as conventional greenhouses generally for states below 40 °N. Future improvements to LSC manufacturing may allow previously unprofitable LSC greenhouses to become economically viable in northern states. This work showcases the broad design space for LSCs in agrivoltaic systems and the strong potential of integrating LSCs into greenhouses.
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    Supporting data for Surface Structure Dependent Circular Dichroism in Single and Double Gyroid Metamaterials
    (2022-06-16) William, Lenart R; Ellison, Christopher J; Ferry, Vivian E; Cote, Bryan M; veferry@umn.edu; Ferry, Vivian E.; Materials Research Science & Engineering Center
    Data includes the processed FDTD simulation results needed to recreate the figures in "Surface Structure Dependent Circular Dichroism in Single and Double Gyroid Metamaterials". The data files include single and double gyroids' reflection, transmission, and absorption spectra, near-field electric field intensity enhancements, and the gyroid 3D models used in the FDTD simulations.