A new Stanford-designed optical amplifier uses energy recycling in a resonator to deliver strong, low-noise amplification with far less power.

While many research efforts are underway to develop active devices that can function in the challenging terahertz spectrum, others are leapfrogging to try to get some devices operate into the ...

Close up of an optical amplifier chip, similar to the one detailed in this study, that is being developed in the lab of Stanford physicist Amir Safavi-Naeini. A red laser light shines from an optical ...