中国物理B ›› 2018, Vol. 27 ›› Issue (8): 87301-087301.doi: 10.1088/1674-1056/27/8/087301
所属专题: SPECIAL TOPIC — Nanophotonics
• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇 下一篇
Deng-Ju He(何登举), Wei-Li Zhang(张伟利), Rui Ma(马瑞), Shan-Shan Wang(王珊珊), Xiao-Min Wu(吴小敏), Yun-Jiang Rao(饶云江)
Deng-Ju He(何登举), Wei-Li Zhang(张伟利), Rui Ma(马瑞), Shan-Shan Wang(王珊珊), Xiao-Min Wu(吴小敏), Yun-Jiang Rao(饶云江)
摘要:
Transverse localization of the optical Tamm plasmon (OTP) is studied in a metal-distributed Bragg reflector (DBR) structure with a one-dimensional disordered layer embedded at the interface between the metal and the DBR. The embedded disordered layer induces multiple scattering and interference of light, forming the light localization in the transverse direction. This together with the formation of Tamm plasmonic modes at the metal-DBR interface (i.e., the confinement of light in the longitudinal direction), gives birth to the so called transverse-localized Tamm plasmon. It is shown that for both transverse electric (TE) and transverse magnetic (TM) polarized light injection, the excited transverse-localized Tamm plasmon broadens and splits the dispersion curve due to spatial incoherence in the transverse direction, thus proving the stronger light confinement especially in the TE polarized injection. By adding the gain medium, specific random lasing modes are observed. The proposed study could be an efficient way of trapping and locally enhancing light on a subwavelength scale, which is useful in applications of random lasers, optical sensing, and imaging.
中图分类号: (Electron states at surfaces and interfaces)