Topic: Chemistry and physics of molecules in cavities

Speaker: Professor Joel Yuen-Zhou - University of California at San Diego

Host: Professor Ben Levine

Date: Thursday, September 20, 2018

Time: 12:00 PM

Location: 1400 BPS

More Information:

Organic molecules interact strongly with confined electromagnetic fields in plasmonic arrays or optical microcavities owing to their bright transition dipole moments. This interaction gives rise to molecular polaritons, hybrid light-matter quasiparticles. Molecular polaritonics opens new room-temperature opportunities for the nontrivial control of physico-chemical properties of molecular assemblies [1]. In this talk, I’ll showcase some of these opportunities that we have been theoretically (and, together with our experimental collaborators) exploring in the past few years. I will discuss the relevant time and energy scales associated with molecular polaritons [1,2] and strategies to exploit them to control photoexcited processes including singlet fission [3], triplet harvesting, and long-range energy transfer [4], and anomalous nonlinear optical effects [5,6]. I’ll conclude by highlighting some exotic possibilities of harnessing polaritons to recreate topologically protected excitations [7,8] or even carry out remote control of chemical reactions.

 

REFERENCES

 

[1] R. F. Ribeiro, L. Martínez-Martínez, M. Du, and J. Yuen-Zhou, Polariton chemistry: controlling molecular dynamics with optical cavities, Chem. Sci. 9, 6325-6339 (2018).

[2] L. A. Martínez-Martínez, R. F. Ribeiro, J. A. Campos-González-Angulo, and J. Yuen-Zhou, Can ultrastrong coupling change ground-state chemical reactions?, ACS Photonics 5, 167 (2018).

[3] L. A. Martínez-Martínez, M. Du, R. F. Ribeiro, S. Kena-Cohen, and J. Yuen-Zhou, Polariton-assisted singlet fission in acene aggregates, J. Phys. Chem. Lett., 9, 1951-1957 (2018) (ACS editor’s choice).

[4] M. Du, L. A. Martínez-Martínez, R. F. Ribeiro, Z. Hu, V. M. Menon, and J. Yuen-Zhou, Theory for polariton assisted remote energy transfer, Chem. Sci. 9, 6659-6669 (2018).

[5] R. F. Ribeiro, A. D. Dunkelberger, B. Xiang, W. Xiong, B. S. Simpkins, J. C. Owrutsky, J. Yuen-Zhou, Theory for nonlinear spectroscopy of vibrational polaritons, J. Phys. Chem. Lett. 9, 13, 3766--3771 (2018).

[6] B. Xiang, R. F. Ribeiro, A. D. Dunkelberger, J. Wang, Y. Li, B. S. Simpkins, J. C. Owrutsky, J. Yuen-Zhou, W. Xiong, Two-dimensional spectroscopy of vibrational polaritons, Proc. Nat. Acad. Sci. 201722063 (2018).