Perovskite Laser Diode's Cryogenic Requirement Highlights Room-Temperature Efficiency of Bitcoin Miners

Inside the device

The device uses a solution-grown perovskite microplate paired with chemically inert single-walled carbon nanotube electrodes, all embedded in an optical microcavity. Under a constant direct current, the researchers achieved polariton lasing. That's a big deal in photonics: continuous-wave operation at cryogenic temperatures is far harder than pulsed lasing, and it's a necessary milestone on the road to practical devices.

The carbon nanotube electrodes are key. They offer high conductivity and chemical stability, avoiding the degradation that plagues