Metallo-dielectric hybrid antenna for high Purcell factor and radiation efficiency

Autor:	Wenhai Yu, Xianghao Zeng, Yonghua Lu, Peiju Yao, Zheng Xi, Pei Wang
Rok vydání:	2014
Předmět:	Materials science Photon business.industry Physics::Optics Context (language use) Dielectric Radiation Atomic and Molecular Physics and Optics Antenna efficiency Optics Optoelectronics Spontaneous emission Antenna (radio) business Plasmon
Zdroj:	Optics express. 22(12)
ISSN:	1094-4087
Popis:	Based on multisphere Green’s function, we investigate the interaction between a dipole source and a hybrid nanoantenna. The parameter of radiation enhancement factor is introduced to characterize spontaneous emission enhancement and radiation efficiency simultaneously. We revisit the emission of silver dimers in the context of radiation enhancement factor. Then the hybrid of metallic nanoparticles (MNPs) and dielectric nanoparticles are designed for strong enhancement as well as high efficiency. Purcell factor over 2000 and radiation efficiency over 50% are achieved by the hybrid antenna. And Purcell factor above 900 with over 57% radiation efficiency is also reached for broadband operation. Such metallo-dielectric hybrid antenna may find potential applications in bright single photon sources and Raman spectroscopy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95f98b737024b15190a01426fe233431 https://pubmed.ncbi.nlm.nih.gov/24977547 Zobrazit plný text záznamu