Linear and nonlinear chiroptical response from individual 3D printed plasmonic and dielectric micro-helices

Sub-wavelength chiral resonators formed from artificial structures exhibit exceedingly large chiroptical responses compared to those observed in natural media. Owing to resonant excitation, chiral near fields can be significantly enhanced for these resonators, holding great promise for developing enantioselective photonic components such as biochemical sensors based on circular dichroism (CD) and spin-dependent nonlinear imaging. In the present work, strong linear and nonlinear chiroptical responses (scattering CD > 0.15 and nonlinear differential CDs > 0.4) at visible and near infrared frequencies are reported for the first time for individual micrometer-scale plasmonic and dielectric helical structures. By leveraging dark-field spectroscopy and nonlinear optical microscopy, the circular-polarization-selective scattering behavior and nonlinear optical responses (e.g., second harmonic generation and two-photon photoluminescence) of 3D printed micro-helices with feature sizes comparable to the wavelength (total length is ∼5λ) are demonstrated. These micro-helices provide potential for readily accessible photonic platforms, facilitating an enantiomeric analysis of chiral materials. One such example is the opportunity to explore ultracompact photonic devices based on single, complex meta-atoms enabled by state-of-the-art 3D fabrication techniques.

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Work Title Linear and nonlinear chiroptical response from individual 3D printed plasmonic and dielectric micro-helices
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Open Access
Creators
  1. Nicole R. Famularo
  2. Lei Kang
  3. Zehua Li
  4. Tian Zhao
  5. Kenneth L. Knappenberger
  6. Christine D. Keating
  7. Douglas H. Werner
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Journal of Chemical Physics
Publication Date October 16, 2020
Publisher Identifier (DOI)
  1. https://doi.org/10.1063/5.0020539
Deposited July 19, 2022

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Version 1
published

  • Created
  • Added PrintedHelices_JCP_Revision_Vsubmitted_merge.pdf
  • Added Creator Nicole R. Famularo
  • Added Creator Lei Kang
  • Added Creator Zehua Li
  • Added Creator Tian Zhao
  • Added Creator Kenneth L. Knappenberger
  • Added Creator Christine D. Keating
  • Added Creator Douglas H. Werner
  • Published
  • Updated Publication Date Show Changes
    Publication Date
    • 2020-10-21
    • 2020-10-16