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Enhancement of Parametric Effects in Polariton Waveguides Induced by Dipolar Interactions

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3];  [3]; ;  [4];  [5];  [5];  [4]
  1. Consiglio Nazionale delle Ricerche (CNR), Lecce (Italy). CNR NANOTEC, Institute of Nanotechnology; Univ. del Salento, Lecce (Italy). Dipartimento di Fisica
  2. Univ. del Salento, Lecce (Italy). Dipartimento di Fisica; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  3. Consiglio Nazionale delle Ricerche (CNR), Lecce (Italy). CNR NANOTEC, Institute of Nanotechnology
  4. Consiglio Nazionale delle Ricerche (CNR), Lecce (Italy). CNR NANOTEC, Institute of Nanotechnology; Istituto Nazionale di Fisica Nucleare (INFN), Lecce (Italy)
  5. Princeton Univ., NJ (United States). PRISM, Princeton Institute for the Science and Technology of Materials
Exciton-polaritons are hybrid light-matter excitations arising from the nonperturbative coupling of a photonic mode and an excitonic resonance. Behaving as interacting photons, they show optical third-order nonlinearities providing effects such as optical parametric oscillation or amplification. It has been suggested that polariton-polariton interactions can be greatly enhanced by inducing aligned electric dipoles in their excitonic part. However, direct evidence of a true particle-particle interaction, such as superfluidity or parametric scattering, is still missing. In this Letter, we demonstrate that dipolar interactions can be used to enhance parametric effects such as self-phase modulation in waveguide polaritons. By quantifying these optical nonlinearities, we provide a reliable experimental measurement of the direct dipolar enhancement of polariton-polariton interactions.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundations EPiQS Initiative; National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1822406
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 126; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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