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

Abstract

The light−matter interactions at nanoscale can be enhanced by Blochsurface 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/cm 2 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.

Dynamic Spectral Modulation Enabled by Conductive Polymer-Integrated Plasmonic Nanodisk-Hole Arrays

“…Therefore, the peak at λ 1 can be regarded as the Bloch-surface plasmon polaritons (Bloch-SPPs) mode. 28 In comparison to the case of the Similarly, the nanodisk array plays a major role in the formation of this resonance dip. Differently from λ 1 , the electric field at the peak of λ 3 is mainly localized around the nanohole array, particularly for the Bloch-SPPs mode at the lower surface of the nanohole array formed.…”

“…Notably, this field distribution is also periodically modulated by the diffractive coupling of the array. Therefore, the peak at λ 1 can be regarded as the Bloch-surface plasmon polaritons (Bloch-SPPs) mode . In comparison to the case of the bottom nanohole array, the Bloch-SPPs mode at the top surface of the nanodisk array plays a major role in the generation of this mode.…”

Modulating Polarization in Second Harmonic Generation through Symmetry Evolution in Plasmonic Lattices

“…This mode is particularly effective in reducing the radiative loss in metals, outperforming the equivalent disordered unit distribution in improving nonlinear processes. , The incident angle sensitivity of the Bloch-SPP mode to the fundamental frequency light enables control over harmonic generation with multiple degrees of freedom. It introduces specific characteristics from the periodic potential field to nonlinear optical signals, which has potential applications in nonlinear plasmonics research. − Moreover, the correlation between the optical behaviors of SHG and the Bloch-SPP modes in plasmonic lattices with centrosymmetric units is an intriguing area of study. To further understand the interplay between SHG signals and plasmonic lattices, there is a need for more sophisticated lattice fabrication technologies.…”

Surface lattice resonances enhanced directional amplified spontaneous emission on plasmonic honeycomb nanocone array

“…Plasmonic resonance induced by metal nanostructures has attracted extensive exploration in the field of photovoltaic conversion, 1 non-linear optics, 2,3 ultra-sensitive optical sensing, 4 and optical signal modulation. 5–9 As a typical resonance phenomenon, however, localized surface plasmon resonance (LSPR) usually exhibits broad spectral linewidth and low quality factor owing to the radiative damping and dynamic depolarization. 10 With the advancement of nanofabrication technology, various configurations of nanostructures for periodic photonic lattices have been developed.…”