Spontaneous emission control in high-extraction efficiency plasmonic crystals

Abstract

We experimentally and theoretically investigate exciton-field coupling for the surface plasmon polariton (SPP) in waveguide-confined (WC) anti-symmetric modes of hexagonal plasmonic crystals in InP-TiOAu-TiO-Si heterostructures. The radiative decay time of the InP-based transverse magnetic (TM)-strained multi-quantum well (MQW) coupled to the SPP modes is observed to be 2.9-3.7 times shorter than that of a bare MQW wafer. Theoretically we find that 80 % of the enhanced photoluminescence (PL) is emitted into SPP modes, and 17 % of the enhanced PL is redirected into WC-anti-symmetric modes. In addition to the direct coupling of the excitons to the plasmonic modes, this demonstration is also useful for the development of high-temperature SPP lasers, the development of highly integrated photo-electrical devices, or miniaturized biosensors.

Tailor-made directional emission in nanoimprinted plasmonic-based light-emitting devices

“…13 Consequently, the angular distribution of light emission in a SSL device is difficult to shape. [23][24][25][26][27][28][29][30][31] While individual metal nanoparticles sustain localized surface plasmon polaritons (LSPPs), an array of such nanoparticles can also support delocalized plasmonic-photonic hybrid states due to the coupling of LSPPs to diffracted or refractive-index guided modes. 20 Nanostructuring strategies represent a versatile approach to tailor the emission properties of colour-converting layers without changing the material structure or the chemical composition of very efficient state-of-the-art emitting materials.…”

Polarized spontaneous emission from an emitter in controlled nodal vacuum fluctuations near a single high reflector

“…is the vacuum permittivity and the asterisk as a superscript denotes the complex conjugate [14][15][16][17][18][19][20][21][22]36,37]. Since the electric fields E j;β;ω r and E − j;β;ω r include electromagnetic waves traveling in the same direction, they are not orthogonal.…”

“…Such nodal vacuum fluctuations suppress or enhance the light emitted at specific angles [14]. If light is coupled to waveguide modes traveling with low group velocity (v g ) [15,16] or surface plasmon polariton modes (SPP) [17,18], a high density of photonic states, which is proportional to 1∕v g , further enhances the SE emission rate [19][20][21][22]. Due to a variety of emission properties and structural simplicity, SE modification in low-dimensional structures attracts much interest in both science and engineering.…”

Electromagnetic-field imbalance in surface plasmon polariton and its role in slow propagation and field-matter interaction

“…Consequently, the SPP-emitter interaction is enhanced in a manner similar to that of a light emitter in a dielectric structure [3,4]. To date, the properties of SPPs have been investigated in various plasmonic structures, such as metal plates, periodic grooves (propagating SPP), particles (localized SPP) [5], and graphene-included structures [6]; further, enhanced spontaneous emission (SE) [7][8][9][10][11][12][13][14][15][16], Raman scattering [17,18], stimulated emission [19], single-photon emission [20,21], and Rabi splitting in the strong-coupling regime [22] have been studied with the SPPs.…”