單向準直微型發光二極體顯示裝置與二氧化鈦超穎介面研究

Research on Unidirectional Collimated Micro LED Display Devices and Titanium Dioxide Metasurfaces

呂嘉偉(Chia-Wei Lu)

指導教授 ： 吳忠幟

國立臺灣大學/電機資訊學院/光電工程學研究所/碩士(2024年)

https://doi.org/10.6342/NTU202403632

摘要

本論文主要探討車用顯示器及生醫影像應用中的光場需求，針對微型發光二極體與自聚焦超穎介面元件進行研究。首先，在車用顯示器的部分，透過基於微共振腔結合微共振腔設計的微型發光二極體，並搭配分佈式布拉格反射器(DBR)進行光場準直設計， 最後選定微透鏡曲率以及像素填充材折射率進行調節光場發散。
在生醫影像應用方面，針對自聚焦超穎透鏡的相位需求，進行模擬與製程，利用Rsoft軟體中 FDTD模擬選取最佳的相位覆蓋及穿透率，並選用TiO2材料進行製作，透過實際製程結果量測，在綠光與藍光中，超穎介面具有較低的雜訊及良好的穿透率，證實了其在自聚焦超穎介面應用中的效益。
本研究驗證了微型發光二極體與自聚焦超穎透鏡在車用顯示器和生醫影像應用中的可行性及優勢，為未來相關領域發展提供了重要參考。

關鍵字

微共振腔 ； 微型發光二極體 ； 單向準直 ； 自聚焦超穎透鏡

並列摘要

This thesis primarily explores the optical field requirements in automotive displays and biomedical imaging applications, focusing on micro-LEDs and abrupt autofocusing metasurfaces. Firstly, for automotive displays, micro-LEDs designed with microcavities, microlens and paired with Distributed Bragg Reflectors (DBR) were employed to achieve collimated light fields. Further adjustments of light field divergence were made using selected micro-lens curvatures and reflective indexes of pixel fill material.

In the biomedical imaging application, simulations and fabrication processes were conducted to meet the phase requirements of abrupt autofocusing metalenses. Using Rsoft FDTD simulations, optimal phase coverage and transmittance were selected, and TiO2 was chosen for fabrication due to its lower absorption in the visible spectrum. Measurement results from the fabricated metasurfaces demonstrated low noise and good transmittance in both green and blue light, confirming their effectiveness in self-focusing applications.

This study validates the feasibility and advantages of micro-LEDs and self-focusing metalenses in automotive display and biomedical imaging applications, providing valuable references for future developments in these fields.

並列關鍵字

Microcavity ； Micro-LED ； Unidirectional Collimation ； Abrupt Autofocuing Metasurface

參考文獻

參考文獻

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