High Q and sub-wavelength THz electric field confinement in ultrastrongly coupled THz resonators  

作　　者：SIMON MESSELOT SOLEN COEYMANS JEROME TIGNON SUKHDEEP DHILLON JULIETTE MANGENEY 

机构地区：[1]Laboratoire de Physique de l’Ecole Normale Supérieure,Ecole normale supérieure,PSL University,Sorbonne Université,UniversitéParis Diderot,Sorbonne Paris Cité,CNRS,24 rue Lhomond,75005 Paris,France

出　　处：《Photonics Research》2023年第7期1203-1216,共14页光子学研究（英文版）

基　　金：Agence Nationale de la Recherche (ANR-19-CE24-0015,ANR-22-CE09-0018);European Research Council (820133)。

摘　　要：The control of light–matter coupling at the single electron level is currently a subject of growing interest for the development of novel quantum devices and for studies and applications of quantum electrodynamics.In the terahertz(THz)spectral range,this raises the particular and difficult challenge of building electromagnetic resonators that can conciliate low mode volume and high quality factor.Here,we report on hybrid THz cavities based on ultrastrong coupling between a Tamm cavity and an LC circuit metamaterial and show that they can combine high quality factors of up to Q=37 with a deep-subwavelength mode volume of V=3.2×10^(-4)λ^(3).Our theoretical and experimental analysis of the coupled mode properties reveals that,in general,the ultrastrong coupling between a metamaterial and a Fabry–Perot cavity is an effective tool to almost completely suppress radiative losses and,thus,ultimately limit the total losses to the losses in the metallic layer.These Tamm cavity-LC metamaterial coupled resonators open a route toward the development of single photon THz emitters and detectors and to the exploration of ultrastrong THz light–matter coupling with a high degree of coherence in the few to single electron limit.

关 键 词：COUPLING CAVITY coupled 

分 类 号：O441.4[理学—电磁学] TN751.2[理学—物理]