On the tunability of quality-factor for optical Tamm plasmon modes. (24th July 2017)

• Record Type: Journal Article
• Authors: Kumar, Samir; Das, Ritwick
• Is Part Of: Journal of optics. Volume 19:Number 9(2017:Sep.)
• Publication Date: 2017-07-24
• Subjects: Tamm plasmon -- Q-factor -- Braggs mirror -- lifetime; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/aa796f
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: We present a comprehensive investigation to ascertain the impact of gold and silver films on modifying the quality-factor (Q-factor) of optical Tamm-plasmon (OTP) resonance in a metal-distributed Bragg reflector (M-DBR) geometry. Here, OTP mode is excited using direct incidence of white-light-source at normal incidence as well as oblique incidence on M-DBR geometry. The lifetime of OTP in gold and silver deposited films on DBR mirror was determined from OTP resonance linewidth. The lifetime and the Q-factor of OTP modes are found to depend on DBR bilayers, metal film thickness as well as on different plasmon active metals. This finding would facilitate tuning the Q-factor and consequently, the lifetime of OTP modes for various applications in all-optical switches and modulators. In addition, we discuss the spectral characteristics of OTP modes excited using normal and oblique incident of source.