利用氮摻雜鑽石製造寬頻雷射

Abstract

在鑽石晶格結構之中可以存有許多的缺陷，例如：不同的原子、空缺、同位素的參雜。至今為止，已知鑽石擁有超過五百種不同的缺陷結構並且都具有不同的光學性質。在這份研究中我們將會探索將具有缺陷的鑽石應用在寬頻雷射的可能性，奈米鑽石在受到離子輻射後，奈米鑽石中不同的缺陷將會放出介於380奈米到800奈米間波長的光子。光學與電子光譜的相關性指出奈米鑽石結構中可存有2到5個氮原子或者缺陷。而布拉格分散式反射器共振腔實驗展示我們可以在寬頻光譜中選定特定的波長使其雷射。基於這些優點，我們設計了隨機雷射的裝置。我們同時利用鑽石為增益介質以及隨機反射共振腔，藉此簡化了光學裝置的製程。隨機鑽石雷射裝置在整個可見光譜上呈現了大量且清晰可分別的峰值，也就是白光雷射。奈米鑽石雷射具有簡易製造的特性以及在高能量下的穩定性對於生命科學與電子學未來的應用具有巨大的潛力。

The diamond lattice can host a multitude of defects, such as heteroatoms, vacancies, and isotopic impurities. To date over 500 different defect structures have been identified by their own unique optical emission and absorption properties. We here exploit the coexistence of different and complex defects for the simulation of optical emission in broadband lasing. Upon illumination of ion-irradiated nanodiamond, optoelectronic interaction in different defects generates enhanced emission in a broad wavelength range between 380nm and 800nm. Correlation of optical and electron spectroscopy indicates the presence of nitrogen and vacancy clusters with 2-5 constituents. Cavity experiments demonstrate the ability to stimulate emission for different defects over a wide illumination range. Based on these advances, random lasers were designed, that utilize diamond as both the gain and scattering medium, thus simplifying the production of optoelectronic devices. The resulting device exhibits a multitude of distinct and sharp emission peaks throughout the visible spectrum, yielding white-light lasing. The facile fabrication and high power stability of diamond-based defect lasers have significant potential for future applications in life-sciences and electronics.