TY - JOUR
T1 - Nanoscale Helical Optical Force for Determining Crystal Chirality
AU - Cheng, An Chieh
AU - Pin, Christophe
AU - Sunaba, Yuji
AU - Sugiyama, Teruki
AU - Sasaki, Keiji
N1 - Publisher Copyright:
© 2024 Wiley-VCH GmbH.
PY - 2024/8/22
Y1 - 2024/8/22
N2 - The deterministic control of material chirality has been a sought-after goal. As light possesses intrinsic chirality, light-matter interactions offer promising avenues for achieving non-contact, enantioselective optical induction, assembly, or sorting of chiral entities. However, experimental validations are confined to the microscale due to the limited strength of asymmetrical interactions within sub-diffraction limit ranges. In this study, a novel approach is presented to facilitate chirality modulation through chiral crystallization using a helical optical force field originating from localized nanogap surface plasmon resonance. The force field emerges near a gold trimer nanogap and is propelled by linear and angular momentum transfer from the incident light to the resonant nanogap plasmon. By employing Gaussian and Laguerre–Gaussian incident laser beams, notable enantioselectivity is achieved through low-power plasmon-induced chiral crystallization of an organic compound–ethylenediamine sulfate. The findings provide new insights into chirality transmission orchestrated by the exchange of linear and angular momentum between light and nanomaterials.
AB - The deterministic control of material chirality has been a sought-after goal. As light possesses intrinsic chirality, light-matter interactions offer promising avenues for achieving non-contact, enantioselective optical induction, assembly, or sorting of chiral entities. However, experimental validations are confined to the microscale due to the limited strength of asymmetrical interactions within sub-diffraction limit ranges. In this study, a novel approach is presented to facilitate chirality modulation through chiral crystallization using a helical optical force field originating from localized nanogap surface plasmon resonance. The force field emerges near a gold trimer nanogap and is propelled by linear and angular momentum transfer from the incident light to the resonant nanogap plasmon. By employing Gaussian and Laguerre–Gaussian incident laser beams, notable enantioselectivity is achieved through low-power plasmon-induced chiral crystallization of an organic compound–ethylenediamine sulfate. The findings provide new insights into chirality transmission orchestrated by the exchange of linear and angular momentum between light and nanomaterials.
KW - chiral crystallization
KW - enantioselectivity
KW - helical conformation
KW - nano–optical trapping
KW - plasmonic manipulation
UR - http://www.scopus.com/inward/record.url?scp=85189493246&partnerID=8YFLogxK
U2 - 10.1002/smll.202312174
DO - 10.1002/smll.202312174
M3 - Article
C2 - 38586919
AN - SCOPUS:85189493246
SN - 1613-6810
VL - 20
JO - Small
JF - Small
IS - 34
M1 - 2312174
ER -