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Nanoscience and Microsystems ETDs

Disordered photonics

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Microsphere-Based Disordered Photonic Structures: Control Of Randomness In Langmuir-Blodgett Assembly And Radiative Cooling Applications, Sarun Atiganyanun May 2019

Microsphere-Based Disordered Photonic Structures: Control Of Randomness In Langmuir-Blodgett Assembly And Radiative Cooling Applications, Sarun Atiganyanun

Nanoscience and Microsystems ETDs

Many biological photonic structures in nature exhibit a significant degree of disorder within their periodic framework that enhances their optical properties. However, how such disorder contributes to the unique photonic characteristics is not yet fully understood. To facilitate studies on this topic, we investigated self-assembly of microspheres as a method to controllably introduce randomness to photonic structures. Specifically, we examined Langmuir-Blodgett assembly, a layer-by-layer fabrication technique. We developed and experimentally verified a model for the process and determined a condition of surface pressure and substrate pulling speed that corresponds to a maximum structural order in a layer. Along the trajectory ...