Strong Light-Matter Coupling for Polaritonic Semiconductor Devices

Department of Electronic Engineering Universitat Autònoma de Barcelona, Barcelona, Spain

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Published online: 3 August 2026

Abstract

Electronics have traditionally involved the interplay between electrons and electromagnetic fields, in both classical and quantum forms. A new milestone in this successful coexistence is the regime of strong light-matter coupling, where the boundaries between light and matter fade, giving rise to hybrid quasiparticles known as polaritons. In this work, we present our research focused on the strong and ultrastrong coupling regime, particularly involving in-tersubband polaritons in semiconductor quantum wells, embedded into an optical cavity, to explore how electronic technologies can benefit from this emerging physics. In particular, realistic scenarios are investigated considering the quantum well as an open system, where electrons enter and exit the quantum well while interacting with light. The implications of polaritons on semiconductor devices, particularly those operating at terahertz frequencies, will also be discussed. Integrating cavity quantum electrodynamics with semiconductor electronics could lead to revolutionary advancements in new electronic-based platforms for quantum information technologies and photonic-electronic systems.