TY - JOUR
T1 - Polarized evanescent waves reveal trochoidal dichroism
AU - McCarthy, Lauren A.
AU - Smith, Kyle W.
AU - Lan, Xiang
AU - Hosseini Jebeli, Seyyed Ali
AU - Bursi, Luca
AU - Alabastri, Alessandro
AU - Chang, Wei Shun
AU - Nordlander, Peter
AU - Link, Stephan
N1 - ACKNOWLEDGMENTS. This work is funded by grants from the Robert A. Welch Foundation (C-1664 to S.L. and C-1222 to P.N.) and the NSF (CHE1903980 to S. L.). L.A.M. and K.W.S. acknowledge that this material is based on work supported by the NSF Graduate Research Fellowship Program (1842494). We thank the Rice University Shared Equipment Authority and Electron Microscopy Center for instrument use and availability. We thank Professors W. E. Moerner (Stanford), Teri Odom (Northwestern), Randall Goldsmith (Wisconsin), David Masiello (University of Washington), Christy Landes (Rice University), and Kallie Willets (Temple) for insightful feedback on our manuscript. We also gratefully acknowledge Professor Gabriela S. Schlau-Cohen (MIT) for helpful discussions on light-harvesting complexes. Finally, the authors thank Mr. Rashad Baiyasi (Rice University) for providing analysis code used for SEM image processing.
This work is funded by grants from the Robert A. Welch Foundation (C-1664 to S.L. and C-1222 to P.N.) and the NSF (CHE1903980 to S. L.). L.A.M. and K.W.S. acknowledge that this material is based on work supported by the NSF Graduate Research Fellowship Program (1842494). We thank the Rice University Shared Equipment Authority and Electron Microscopy Center for instrument use and availability. We thank Professors W. E. Moerner (Stanford), Teri Odom (Northwestern), Randall Goldsmith (Wisconsin), David Masiello (University of Washington), Christy Landes (Rice University), and Kallie Willets (Temple) for insightful feedback on our manuscript. We also gratefully acknowledge Professor Gabriela S. Schlau-Cohen (MIT) for helpful discussions on light-harvesting complexes. Finally, the authors thank Mr. Rashad Baiyasi (Rice University) for providing analysis code used for SEM image processing.
PY - 2020/7/14
Y1 - 2020/7/14
N2 - Matter’s sensitivity to light polarization is characterized by linear and circular polarization effects, corresponding to the system’s anisotropy and handedness, respectively. Recent investigations into the near-field properties of evanescent waves have revealed polarization states with out-of-phase transverse and longitudinal oscillations, resulting in trochoidal, or cartwheeling, field motion. Here, we demonstrate matter’s inherent sensitivity to the direction of the trochoidal field and name this property trochoidal dichroism. We observe trochoidal dichroism in the differential excitation of bonding and antibonding plasmon modes for a system composed of two coupled dipole scatterers. Trochoidal dichroism constitutes the observation of a geometric basis for polarization sensitivity that fundamentally differs from linear and circular dichroism. It could also be used to characterize molecular systems, such as certain light-harvesting antennas, with cartwheeling charge motion upon excitation.
AB - Matter’s sensitivity to light polarization is characterized by linear and circular polarization effects, corresponding to the system’s anisotropy and handedness, respectively. Recent investigations into the near-field properties of evanescent waves have revealed polarization states with out-of-phase transverse and longitudinal oscillations, resulting in trochoidal, or cartwheeling, field motion. Here, we demonstrate matter’s inherent sensitivity to the direction of the trochoidal field and name this property trochoidal dichroism. We observe trochoidal dichroism in the differential excitation of bonding and antibonding plasmon modes for a system composed of two coupled dipole scatterers. Trochoidal dichroism constitutes the observation of a geometric basis for polarization sensitivity that fundamentally differs from linear and circular dichroism. It could also be used to characterize molecular systems, such as certain light-harvesting antennas, with cartwheeling charge motion upon excitation.
KW - Born–Kuhn model for circular dichroism
KW - Evanescent field polarization
KW - Plasmonic nanorod dimers
KW - Single-particle spectroscopy
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U2 - 10.1073/pnas.2004169117
DO - 10.1073/pnas.2004169117
M3 - Article
C2 - 32601234
AN - SCOPUS:85088179943
SN - 0027-8424
VL - 117
SP - 16143
EP - 16148
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 28
ER -