Photonic stopband tuning of organic semiconductor distributed feedback lasers by oblique angle deposition of an intermediate high index layer

Stroisch, M.; Teiwes-Morin, C.; Woggon, Thomas; Gerken, Martina; Lemmer, Uli; Forberich, Karen; Gombert, Andreas

doi:10.1063/1.3184591

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Experimental investigations could reveal whether the simulated changes of the angular emissions spectra are observable in actual OLEDs. The fabrication of the necessary local isolation layers may be achieved using oblique deposition techniques 35,36 or lithography based on anisotropic etching. 37 We believe that the combined electrical and optical optimization of nanostructured OLEDs, taking into account the localized fields, can considerably improve the resonance-to-background ratio of the directionally outcoupled light, which is especially important for the development of compact integrated photonic lab-on-chip sensors.…”

Section: Discussionmentioning

confidence: 99%

Effect of localized current distributions in periodically nanostructured OLEDs on the resonant light outcoupling

Lueder

Buhl

Gerken

2022

Physics and Simulation of Optoelectronic Devices XXX

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We present an electrical and optical model for simulating the current distribution in and the resonant light emission from nanostructured organic light-emitting diodes (OLEDs). A periodic nanostructure in an OLED can be used as a resonant waveguide grating to tailor the light emission, i.e., to direct the dominant emission wavelength into a specific direction. We show that the current injection at nanostructured electrodes is strongly enhanced at their corners, leading to localized current paths and emission zones. These current paths have to be overlapping with the resonant optical field hot spots in order to gain maximal resonant light outcoupling. We show that this is not generally the case for periodically nanostructured OLEDs and that the introduction of local isolation layers can improve the overlap by altering the current paths. Depending on the isolation layer configuration either the resonant or non-resonant light outcoupling is pronounced. This optimization potential may be beneficial for compact organic optoelectronic sensors that require highly directional OLED emission.

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Section: Discussionmentioning

confidence: 99%

Effect of localized current distributions in periodically nanostructured OLEDs on the resonant light outcoupling

Lueder

Buhl

Gerken

2022

Physics and Simulation of Optoelectronic Devices XXX

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Tunable Photonic Crystal Filter

2014

Photonic Crystals

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Enhanced sensitivity of photonic crystal slab transducers by oblique-angle layer deposition

Nazirizadeh¹,

Oertzen²,

Karrock³

et al. 2013

Opt. Express

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Photonic crystal slabs (PCS) are one of the major transducers for label-free, optical biosensing applications. In this paper we present oblique-angle layer deposition of the high index slab material as a method to improve the PCS sensitivity. In simulations and experiments we consider PCSs composed of a high index silicon monoxide layer on a nanostructured resist layer on a glass substrate. By mounting the substrate at an oblique angle with respect to the evaporation source, the high index material distribution on the nanostructured surface is modified due to shadowing effects. Finite-difference time-domain (FDTD) simulations were performed to predict bulk and surface sensitivities. In order to verify the simulation results we fabricated PCSs at various deposition angles using nanoimprint lithography to replicate a linear grating nanostructure into the resist layer and thermal evaporation for a 60-nm silicon monoxide deposition. The bulk sensitivities of these structures were measured using water-glycerol dilutions. A sensitivity improvement of 281% was obtained for PCSs fabricated at 45° deposition angle compared to normal incidence deposition.

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Photonic stopband tuning of organic semiconductor distributed feedback lasers by oblique angle deposition of an intermediate high index layer

Cited by 3 publications

References 13 publications

Effect of localized current distributions in periodically nanostructured OLEDs on the resonant light outcoupling

Effect of localized current distributions in periodically nanostructured OLEDs on the resonant light outcoupling

Tunable Photonic Crystal Filter

Enhanced sensitivity of photonic crystal slab transducers by oblique-angle layer deposition

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