純二維材料可拉伸與寬頻譜隨機雷射

Abstract

二維半導體材料的出現與發展帶給了可穿戴式光電裝置在許多應用方面的突破，但基於純二維材料來構成的雷射裝置卻寥寥無幾。在這篇論文中我們展示了二硫化鉬與石墨烯應用在可拉伸性及寬頻譜雷射裝置的潛力。透過石墨烯獨特的機械延展性創造出皺褶結構並結合了摻雜組胺酸的二硫化鉬的光學性質能使得裝置在光激發下不斷地產生受激輻射並放大光訊號而產生寬頻譜雷射。實驗結果展示了此裝置能透過改變二硫化鉬的摻雜量與改變拉伸程度來得到不同強度的雷射訊號。因此純二維材料構成的雷射裝置能對可穿戴式、寬頻譜和更薄的光電應用帶來新的可能性。

The advent and development of 2D materials have brought the breakthrough of widespread applications in wearable optoelectronic devices, while there is still a lack of laser devices based on the integration of all 2D materials. In this study, we have demonstrated the potential of histidine-doped MoS2/graphene metamaterials for stretchable and broadband laser devices. Utilizing the unique mechanical and optical properties of histidine-doped MoS2 and graphene, respectively, we showed that wrinkled structures of histidine-doped MoS2/graphene metamaterials induce stimulated emission under optical excitations, and the radiation of stimulated emission can be amplified by multiple scattering in between the hills and valleys of the wrinkles, leading to broadband lasers. The laser actions of the devices are influenced by doping concentrations of L-histidine and can be tuned by applying external strain. This presented stretchable laser devices based on all 2D metamaterials open new possibilities for future developments of wearable, broadband, and much thinner optoelectronic applications.