Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Article number | 62 |
Journal / Publication | Light: Science and Applications |
Volume | 9 |
Online published | 16 Apr 2020 |
Publication status | Published - 2020 |
Externally published | Yes |
Link(s)
DOI | DOI |
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Attachment(s) | Documents
Publisher's Copyright Statement
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85083661456&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(060b8d0d-57aa-42b8-ad75-0bdb79c12f45).html |
Abstract
Lateral optical forces induced by linearly polarized laser beams have been predicted to deflect dipolar particles with opposite chiralities toward opposite transversal directions. These “chirality-dependent” forces can offer new possibilities for passive all-optical enantioselective sorting of chiral particles, which is essential to the nanoscience and drug industries. However, previous chiral sorting experiments focused on large particles with diameters in the geometrical-optics regime. Here, we demonstrate, for the first time, the robust sorting of Mie (size ~ wavelength) chiral particles with different handedness at an air–water interface using optical lateral forces induced by a single linearly polarized laser beam. The nontrivial physical interactions underlying these chirality-dependent forces distinctly differ from those predicted for dipolar or geometrical-optics particles. The lateral forces emerge from a complex interplay between the light polarization, lateral momentum enhancement, and out-of-plane light refraction at the particle-water interface. The sign of the lateral force could be reversed by changing the particle size, incident angle, and polarization of the obliquely incident light.
Research Area(s)
Citation Format(s)
Chirality-assisted lateral momentum transfer for bidirectional enantioselective separation. / Shi, Yuzhi; Zhu, Tongtong; Zhang, Tianhang et al.
In: Light: Science and Applications, Vol. 9, 62, 2020.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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