Interactions between excitation and extraction modes in an organic-based plasmon-emitting diode

Nan-Fu Chiu (1) , Maxime Le Ster (1, 2) , Cheng-Du Yang (1) , Ming-Hung Tseng (1) , Feng-Yu Tsai (1)

1 NTU - National Taiwan University [Taiwan]
2 LGCGM - Laboratoire de Génie Civil et Génie Mécanique

This study demonstrates the feasibility of enhancing an organic-based plasmon-emitting diode on the directional light beaming efficiency by near-field surface plasmon polaritons (SPPs) in both metal grating and polymer grating nanostructures. The interaction between organic/metal and PR/metal interfaces to cause SPPs can facilitate specific directional emission. Directional emission properties give rise to a spectral band-gap response enhancement. Our results also verify that efficient surface plasmon grating coupled emissions (SPGCEs) can improve directionality under index-mediated tuning. Experimental results indicate SP decoupling emission in the visible light. The subsequent emission intensity can increase by up to 3.5 times. Moreover, a narrow FWHM of approximately 60 nm in a defined direction is achieved, and an SP coupling rate is approximately 80% on the metal grating structure. The proposed method is highly promising for use as an active plasmonic emitter and discoloration biosensors with enhanced SPPs resonance energy, owing to interactions with the organic/metal nanostructure

Mots clés: Biosensors; Directional emission; Full-width at half-maximum (FWHM); Plasmonic emitter; Surface plasmon grating coupled emissions (SPGCEs); Surface plasmon polaritons (SPPs)

Domaines: Génie civil; Mécanique [physics.med-ph]

Nan-Fu Chiu, Maxime Le Ster, Cheng-Du Yang, Ming-Hung Tseng, Feng-Yu Tsai. Interactions between excitation and extraction modes in an organic-based plasmon-emitting diode. Applied Surface Science, 2015, 332, pp.97--104. ⟨10.1016/j.apsusc.2015.01.148⟩. ⟨hal-01225593⟩