Figure (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Left, model of the atomic structure of the quantum light-emitting defect in silicon (grey), composed of two substitutional carbon atoms (black), and one silicon interstitial atom (pink). The size of the quantum emitter is about 1 nanometer (1 billionth of a meter). Right, spectra from quantum emitters showing more intense light emission following exposure of a silicon crystal to a high flux of protons from intense pulses (black) compared to the conventional method of low flux exposure to protons over extended periods of time (blue). Credit Wei Liu Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.