白光隨機雷射

Abstract

由於隨機雷射的產生機制和傳統雷射本質上有所不同，使得隨機雷射可以有更良好的特性及更廣泛的應用，例如高光譜輻射率及廣角的特性，在照明系統及鑑識科技上，都比傳統雷射有更良好的發揮。在本篇論文當中，通過低成本全溶液製程和自組裝結構，製造並演示高純度和高穩定性的白光隨機雷射。值得注意的是，白光隨機雷射的波長，線寬和強度幾乎是各向同性的，這在任何傳統雷射系統中是難以實現。通過單晶薄膜上集成三個獨立的單色雷射光薄膜和選擇性泵激能量以及適當的色彩平衡，動態微調廣域可見光範圍內的色彩也是可行的。伴隨這些優良特性，白光隨機雷射在高亮度照明，全場成像，全彩色顯示器，可見光通信和醫療生物傳感等領域都有很高的潛力。

Random laser with intrinsically uncomplicated fabrication processes, high spectral radiance, angle-free emission, and conformal onto freeform surfaces is in principle ideal for a variety of applications, ranging from lighting to identification systems. In this work, a white random laser (White-RL) with high-purity and high-stability is designed, fabricated, and demonstrated via the cost-effective materials (e.g., organic laser dyes) and simple methods (e.g., all-solution process and self-assembled structures). Notably, the wavelength, linewidth, and intensity of White-RL are nearly isotropic, nevertheless hard to be achieved in any conventional laser systems. Dynamically fine-tuning colour over a broad visible range is also feasible by on-chip integration of three free-standing monochromatic laser films with selective pumping scheme and appropriate colour balance. With these schematics, White-RL shows great potential and high application values in high-brightness illumination, full-field imaging, full-colour displays, visible-colour communications, and medical biosensing.