新穎光致伸縮材料之開發與應用

Advanced Photostrictive Materials

劉懿德(Yi-De Liou) ； 楊展其(Jan-Chi Yang)

《真空科技》 30卷3期 (2017/09) Pp. 32-47

摘要

光致伸縮效應為以非熱效應的形式，透過光與物質間交互作用而使材料產生形變的現象。光致伸縮效應的觀察可以追朔至1960年代或更早，而其發展與研究速度在近五到十年漸漸地受到重視並持續加速中。在本篇文章裡，我們將簡介已被觀察到具有光致伸縮特性的四種主要的材料體系，分別為鐵電、極性與非極性半導體、有機高分子，以及複雜性氧化物。我們首先將回顧許多有關光致伸縮的重要文獻與目前技術上的應用，以及目前遇到的瓶頸。建構了觀察與分析光致伸縮材料與其特性之能力與知識後，我們將把注意力放在具有極大光致伸縮效應的新穎複雜氧化物的開發與探討研究上。具光致伸縮效應的複雜性氧化物系統擁有極大的潛力成為室溫光調控的媒介，讓我們能夠即時地透過磊晶應力傳遞的方式，調控功能性材料的物理特性，讓新穎元件設計有更多可能性，相關的應用更可以用在許多新穎的光電元件設計與應用之上。在本篇文章中我們亦將點出光致伸縮材料的未來挑戰與方向，以及可能的解決辦法。

關鍵字

光致伸縮 ； 功能性材料 ； 複雜性氧化物 ； 拉曼光譜 ； 薄膜材料

並列摘要

Photostriction - a nonthermal mechanical deformation of materials originated from light-matter interactions in solid - has captured significant attention in the past decade due to its talented capability of direct conversion of light into mechanical energy. Cutting-edge studies have been focused on the characterization of the photostrictive effect as well as the discovery of different material systems that exhibit remarkable photostriction effect. This review article offers a general introduction and overview to the four main groups of photostrictive materials, i.e. ferroelectrics, polar and non-polar semiconductors, organic-based materials and complex oxides. The fundamental basis of mechanisms behind the light induced deformation will be presented as well. We will then continue to review some of the representative articles and technique applications based on the discovery of photostriction in depth. Aiming for the creation of new opportunities and further exploration toward daily applications based on photostrictive materials, the photostrictive system can be treated as an elegant medium to transfer the optical controllable strain onto functional systems built on top. Several key reports on the superlattice and nanostructure taking advantage of the photostriction effect are reviewed, in which the epitaxial strain has played the focal role to link different types of functional materials and photostrictive materials, enabling direct/indirect manipulations of multifunctionalities via the light illumination. A brief discussion on foreseeable challenges as well as future directions is given at the end of this article, with the hope to impact modern green and nano technology, especially optomechanical and optoelectric applications.

並列關鍵字

photostriction ； functional materials ； complex oxides ； Raman spectrum ； thin film materials