Speaker
Description
In this presentation, I will review some recent experimental [1,2] and theoretical attempts [3,4] to design innovative electromagnetic cavities for chiral-sensing purposes or polaritonic chemistry. In particular, I will focus on the interplay between the degree of polarization of the optical cavitymode and the intra-cavity light-matter interactions, exhibiting some difficulties to enhance circular-dichroism in standard optical Fabry-Pérot cavities. I will then provide some general theoretical framework [4,5,6] to describe the rich physical mechanisms that are responsible for the polarization-dependent transmission and absorption signals, developing in linear and reciprocal Fabry-Pérot optical cavities. An example will be shown of helicity-preserving cavity [3,4] made of two photonic dielectric mirrors. A Pasteur medium hosted inside such a cavity is shown to couple efficiently, in a narrow frequency range, to both the output electromagnetic field and to the helicity-preserving cavity mode, thus inheriting an enhanced chiral character. For such cavities, I will show some interesting theoretical predictions, reporting clear signatures of the formation of chiral cavitypolaritons. Some open perspectives in the theoretical modeling [7,8], experimental design and use of such chiral Fabry-Perot cavities in the strong-coupling regime for ultrasensitive chiral sensing in optics or stereochemistry will be given.
References:
[1] Semnani et al., Light: Science & Applications, 9:23 (2020).
[2] J. Gautier et al., ACS Photonics, 9, 778−78 (2022)
[3] K. Voronin et al., ACS Photonics, 9, 2652−2659 (2022).
[4] L. Mauro, J. Fregoni, J. Feist, and R. Avriller, Phys. Rev. A 107, L021501 (2023).
[5] R. Carminati et al., Phys. Rev. A, 62, 012712 (2000).
[6] I. Fernandez-Corbaton et al., Phys. Rev. X, 6, 031013 (2016).
[7] R. R. Riso et al., Phys. Rev. X 13, 031002 (2023).
[8] C. Schäfer et al., J. Phys. Chem. Lett. 14, 3777−3784 (2023).
