Electrically pumped random lasers

Over the past decades extensive research has been carried out to study the lasing characteristics of random media. Some unexpected phenomena of random lasing action have also been discovered. Nevertheless, random laser technologies have never been commercialized for any practical application. So, is there anything missing in the study of random lasers? Will there be a solution to this dilemma? In this topical review, we will investigate the obstacles preventing the commercialization of random laser technologies, give an overview of the current progress of electrically pumped random lasers, and explain the reasons why it is necessary to further develop random laser diodes for practical applications.