Latest Lasing threshold Stories

Team makes startling discovery in highly efficient, 'thresholdless' laser A team of University of California, San Diego researchers has built the smallest room-temperature nanolaser to date, as well as an even more startling device: a highly efficient, "thresholdless" laser that funnels all its photons into lasing, without any waste. The two new lasers require very low power to operate, an important breakthrough since lasers usually require greater and greater "pump power" to begin...

Natural cavities act like mirrors in light-emitting plasticsWhen University of Utah scientists discovered a new kind of laser that was generated by an electrically conducting plastic or polymer, no one could explain how it worked and some doubted it was real. Now, a decade later, the Utah researchers have found these "random lasers" occur because of natural, mirror-like cavities in the polymers, and they say such lasers may prove useful for diagnosing cancer."Nobody knew how it...