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The strong coupling between an intersubband excitation in a quantum cascade structure and a photonic mode of a planar microcavity has been detected by angle-resolved photovoltaic measurements. A typical anticrossing behavior, with a…

Artificial cavity photon resonators with ultrastrong light-matter interactions are attracting interest both in semiconductor and superconducting systems, due to the possibility of manipulating the cavity quantum electrodynamic ground state…

The prototypical system constituted by a two-level atom interacting with a quantized single-mode electromagnetic field is described by the quantum Rabi model (QRM). The QRM is potentially valid at any light-matter interaction regime,…

Strong light-matter coupling is a quantum process in which light and matter are coupled together, generating hybridized states. This is similar to the notion of molecular hybridization, but one of the components is light. Here, we utilized…

Applied Physics · Physics 2024-02-20 Jhuma Dutta , Pooja Bhatt , Kuljeet Kaur , Daniel E. Gómez , Jino George

Coherent light-matter interaction at the single photon and electronic qubit level promises the remarkable potential for nonclassical information processing. Against the efforts of improving the figure of merit of the cavities, here we…

Quantum Physics · Physics 2015-06-19 Yong-Chun Liu , Xingsheng Luan , Hao-Kun Li , Qihuang Gong , Chee Wei Wong , Yun-Feng Xiao

Room temperature cavity quantum electrodynamics with molecular materials in optical cavities offers exciting prospects for controlling electronic, nuclear and photonic degrees of freedom for applications in physics, chemistry and materials…

Quantum Physics · Physics 2025-01-15 Felipe Herrera , William L. Barnes

We present a detailed study of the electroluminescence of intersubband devices operating in the light-matter strong coupling regime. The devices have been characterized by performing angle resolved spectroscopy that shows two distinct light…

Mesoscale and Nanoscale Physics · Physics 2012-12-27 Pierre Jouy , Angela Vasanelli , Yanko Todorov , Luca Sapienza , Raffaele Colombelli , Ulf Gennser , Carlo Sirtori

Engineering phases of matter in cavities requires effective light-matter coupling strengths that are on the same order of magnitude as the bare system energetics, coined the ultra-strong coupling regime. For models of itinerant electron…

The ultrastrong light-matter interaction regime was investigated in metallic and superconducting complementary split ring resonators coupled to the cyclotron transition of two dimensional electron gases. The sub-wavelength light confinement…

Ultrastrong light-matter coupling has traditionally been studied in optical cavities, where it occurs when the light-matter coupling strength reaches a significant fraction of the transition frequency. This regime fundamentally alters the…

Optics · Physics 2025-05-13 Niclas S. Mueller , Eduardo B. Barros , Stephanie Reich

We embedded an all-hydrocarbon-based carbocation in a metallic microcavity that was tuned to resonance with an electronic transition of the carbocation. The measured Rabi splitting was 41% of the excitation energy, putting the system well…

Quantum Physics · Physics 2022-04-11 Mao Wang , Suman Mallick , Anton Frisk Kockum , Karl Börjesson

Light-matter interaction in the ultrastrong coupling regime can be used to generate exotic ground states with two-mode squeezing and may be of use for quantum enhanced sensing. Current demonstrations of ultrastrong coupling have been…

Quantum Physics · Physics 2024-11-08 Kahan Dare , Jannek J. Hansen , Iurie Coroli , Aisling Johnson , Markus Aspelmeyer , Uroš Delić

Recent experiments have revealed ultrastrong coupling between light and matter as a promising avenue for modifying material properties, such as electrical transport, chemical reaction rates, and even superconductivity. Here, we explore…

Optics · Physics 2022-09-07 Josephine Yu , Jamison Sloan , Nicholas Rivera , Marin Soljacic

The interaction between an atom and the electromagnetic field inside a cavity has played a crucial role in the historical development of our understanding of light-matter interaction and is a central part of various quantum technologies,…

Quantum Physics · Physics 2017-02-01 Fumiki Yoshihara , Tomoko Fuse , Sahel Ashhab , Kosuke Kakuyanagi , Shiro Saito , Kouichi Semba

The ground state of a cavity-electron system in the ultrastrong coupling regime is characterized by the presence of virtual photons. If an electric current flows through this system, the modulation of the light-matter coupling induced by…

Quantum Physics · Physics 2019-05-16 Mauro Cirio , Nathan Shammah , Neill Lambert , Simone De Liberato , Franco Nori

Recent experiments have demonstrated that light and matter can mix together to an extreme degree, and previously uncharted regimes of light-matter interactions are currently being explored in a variety of settings. The so-called ultrastrong…

Quantum Physics · Physics 2019-06-19 P. Forn-Díaz , L. Lamata , E. Rico , J. Kono , E. Solano

Cavity and circuit QED study light-matter interaction at its most fundamental level. Yet, this interaction is most often neglected when considering the coupling of this system with an environment. In this paper, we show how this…

Quantum Physics · Physics 2011-10-24 Félix Beaudoin , J. M. Gambetta , A. Blais

There is growing interest in using strongly coupled organic microcavities to tune molecular dynamics, including the electronic and vibrational properties of molecules. However, very little attention has been paid to the utility of cavity…

Materials Science · Physics 2024-06-12 Bin Liu , Vinod M. Menon , Matthew Y. Sfeir

We study thermal emission of a cavity quantum electrodynamic system in the ultrastrong-coupling regime where the atom-cavity coupling rate becomes comparable the cavity resonance frequency. In this regime, the standard descriptions of…

Quantum Physics · Physics 2013-04-04 A. Ridolfo , M. Leib , S. Savasta , M. J. Hartmann

Strong light-matter coupling gives rise to polaritons - hybrid excitations whose mixed photonic and matter character enables control over optical, electronic and chemical properties. This Feature Article surveys the main architectures…