Bloch-Surface Plasmon Polariton Enhanced Amplified and Directional Spontaneous Emission from Plasmonic Hexagonal Nanohole Array

Dongda Wu; Yi Wang; Yujun Liu; Junqiao La; Shijia He; Fanzhou Lv; Wenxin Wang

doi:10.1021/acsami.2c22139

Bloch-Surface Plasmon Polariton Enhanced Amplified and Directional Spontaneous Emission from Plasmonic Hexagonal Nanohole Array

ACS Appl Mater Interfaces. 2023 Mar 29;15(12):16198-16203. doi: 10.1021/acsami.2c22139. Epub 2023 Mar 15.

Authors

Dongda Wu^{1

2}, Yi Wang^{1

2}, Yujun Liu¹, Junqiao La^{1

2}, Shijia He^{1

2}, Fanzhou Lv¹, Wenxin Wang^{1

2}

Affiliations

¹ College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, P. R. China.
² Qingdao Innovation and Development Center of Harbin Engineering University, Harbin Engineering University, 266500 Qingdao, P. R. China.

PMID: 36920178
DOI: 10.1021/acsami.2c22139

Abstract

The light-matter interactions at nanoscale can be enhanced by Bloch-surface plasmon polariton (Bloch-SPP) on the plasmonic lattice. An Ag nanohole array in hexagonal arrangement served as an optical cavity to realize the directional and polarized amplified spontaneous emission (ASE) of R6G. A 100-fold enhanced ASE was observed at 15° emission angle under TM polarization when the pump power density exceeded the threshold of 198 W/cm² based on the degenerated high state density modes. Moreover, a specific polarization dependence of ASE was modulated by the Bloch-SPP modes, and the degree of polarization was enhanced from 1.3 to 2.1 when the pump power density exceeded the threshold of ASE. This work clarifies the interaction between the gain media and plasmonic systems, which lays a foundation for the plasmonic device designing.

Keywords: anodic aluminum oxide; directional amplified spontaneous emission; plasmonic nanohole array; polarization dependence; surface plasmon polariton.