Controlling the Band Structures in Defect-Enhanced Metal-Dielectric Photonic Crystals

ORAL

Abstract

Through the periodic arrangement of metal and dielectric films, one-dimensional photonic crystals can be designed to manipulate the propagation of light. This work explores the manipulation of the photonic band structure in metal-dielectric photonic crystals (MDPCs) through defect engineering within stacked organic semiconductor microcavities. By introducing aperiodic crystal defects into the cavity layers, we demonstrate both theoretically and experimentally how these defects create localized mid-gap states and impact the transmission properties of the photonic crystal. Our transfer matrix simulations and experimental results reveal that defect size and location within the cavity stack offer a precise control mechanism over the band structure, creating well defined mid-gap states and enabling the selective enhancement or suppression of resonance between adjacent cavities. This tunability introduces new possibilities for passive optical filters and optoelectronic devices, including enhanced control over emission spectra in OLED-based systems. Our findings establish a foundation for novel approaches in spectral manipulation and field localization, opening pathways to advanced applications in photonic device engineering.

*This material is based upon work supported by the National Science Foundation under Grant No. OISE-2230706. Any opinions, findings, and conclusions or recommendations expressed are those of the authors and do not necessarily reflect the views of the National Science Foundation. This work was partially supported by JSPS Partnership for International research and Education (PIRE) Grant Number JPJSJRP20221201. The JSPS and NSF grants represent complementary funding in support of "US-Japan partnership in Excitonic Soft Materials for Clean energy".

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Presenters

  • Khadga S Thakuri

    • Department of Physics, The University of Vermont, Burlington, Vermont 05405, USA

Authors

  • Khadga S Thakuri

    • Department of Physics, The University of Vermont, Burlington, Vermont 05405, USA

  • Thomas Cleary

    • Department of Physics, The University of Vermont, Burlington, Vermont 05405, USA

  • David Allemeier

    • Department of Mechanical Engineering, Boston University, Boston, Massachusetts, 02215, USA

  • Taisei Kimura

    • Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan

  • Naoya Aizawa

    • Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan

  • Ken-Ichi Nakayama

    • Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan

  • Akito Masuhara

    • Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata, 992-8510, Japan

  • Matthew Schuette White

    • Department of Physics and Material Science Program, The University of Vermont, Burlington, Vermont 05405, USA