Effect of Mirror Characteristics on Critical Coupling in Plasmonic Nanostructures

Indian Journal of Pure & Applied Physics

article

Jagathpriya L M¹  Shourya Dutta-Gupta¹ 

[1] Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad

关键词: Plasmonics;    Gold nanoparticles;    Critical coupling;    Perfect absorption;    Article;   

DOI  :  10.56042/ijpap.v61i7.105

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

Plasmonic nanostructures have been used in various non-destructive sensing and modulation applications. The efficiency of plasmonic structures can be tuned by controlling their net optical absorption and near-field enhancement. In the current study, we numerically investigate the effect of mirror characteristics on absorption and near-field enhancement in critically coupled plasmonic structures. We explore structures with metallic mirrors and dielectric Bragg reflectors (DBR) and show that the optical response can be enhanced by a judicious choice of spacer thickness and operating wavelength. The results presented in this study provide a roadmap for designing plasmonic substrates with enhanced efficiencies.

【 授权许可】

Unknown