Abstract

The inherent weak nature of chiroptical signals provided by typical polarimetric measurements of natural optically active media has led to the development of different techniques to achieve enhanced chiral sensing. Intuitively, the introduction of gain could provide the desired enhancement; however, this requires gain media that can couple directly to the chiral medium. Here, it is shown that nanophotonic systems that generate collinear electric and magnetic dipole moments can mediate the coupling between the gain and chiral medium, leading to signals stronger than those achieved by the chiral medium alone or when combined with the same nanophotonic system without gain. Depending on how strongly gain couples with the nanophotonic system, both background amplification and loss compensation are possible. In this context, it also is shown that the enhancement occurs within the regime of loss compensation, because background amplification may also result in amplified transmitted fields, but does not guarantee the enhancement of chiroptical signals.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Bilayer terahertz chiral metasurfaces with different dihedral symmetries

Maxim Masyukov, Alexander N. Grebenchukov, Anna V. Vozianova, and Mikhail K. Khodzitsky
J. Opt. Soc. Am. B 38(2) 428-434 (2021)

Transmission enhancement in periodic chiral metamaterials with dispersion and gain

Yanyan Huang, Qingqing Zhu, Xiaowei Zhang, Xiang Yu, Hongli Chen, and Chonggui Zhong
J. Opt. Soc. Am. B 37(9) 2646-2654 (2020)

Theoretical study of tunable chirality from graphene integrated achiral metasurfaces

Tun Cao, Yang Li, Xinyu Zhang, and Yang Zou
Photon. Res. 5(5) 441-449 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Supplementary Material (1)

NameDescription
Supplement 1       Supplemental document.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription