Emergence and control of photonic band structure in stacked OLED microcavities
| Autor: | Ekraj Dahal, Benjamin Isenhart, David Allemeier, Yuki Tsuda, Tsukasa Yoshida, Matthew S. White |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Multidisciplinary
Materials science business.industry Physics::Instrumentation and Detectors Science General Physics and Astronomy Physics::Optics General Chemistry Article General Biochemistry Genetics and Molecular Biology Photonic crystals High Energy Physics::Theory Density of states OLED Optoelectronics Energy level Organic LEDs Photonics business Electronic band structure Photonic crystal Common emitter Diode |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | We demonstrate an electrically-driven metal-dielectric photonic crystal emitter by fabricating a series of organic light emitting diode microcavities in a vertical stack. The states of the individual microcavities are shown to split into bands of hybridized photonic energy states through interaction with adjacent cavities. The propagating photonic modes within the crystal depend sensitively on the unit cell geometry and the optical properties of the component materials. By systematically varying the metallic layer thicknesses, we show control over the density of states and band center. The emergence of a tunable photonic band gap due to an asymmetry-introduced Peierls distortion is demonstrated and correlated to the unit cell configuration. This work develops a class of one dimensional, planar, photonic crystal emitter architectures enabling either narrow linewidth, multi-mode, or broadband emission with a high degree of tunability. Understanding and manipulating the photonic band structure formed in stacked Fabry-Pérot microcavity organic light-emitting diodes (OLEDs) is key to optimizing their performance. Here, through intelligent device design, the authors tune the photonic band gap in vertically-stacked OLED microcavities. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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