Emergence and control of photonic band structure in stacked OLED microcavities

David Allemeier; Benjamin Isenhart; Ekraj Dahal; Yuki Tsuda; Tsukasa Yoshida; Matthew S White

doi:10.1038/s41467-021-26440-3

Emergence and control of photonic band structure in stacked OLED microcavities

Nat Commun. 2021 Oct 20;12(1):6111. doi: 10.1038/s41467-021-26440-3.

Authors

David Allemeier¹, Benjamin Isenhart², Ekraj Dahal¹, Yuki Tsuda³, Tsukasa Yoshida⁴, Matthew S White^{5

6}

Affiliations

¹ Materials Science Program, University of Vermont, Burlington, VT, 05405, USA.
² Department of Physics, University of Vermont, Burlington, VT, 05405, USA.
³ Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan.
⁴ Graduate School of Organic Materials Science, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan.
⁵ Materials Science Program, University of Vermont, Burlington, VT, 05405, USA. mwhite25@uvm.edu.
⁶ Department of Physics, University of Vermont, Burlington, VT, 05405, USA. mwhite25@uvm.edu.

Abstract

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.

Abstract

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