Laser diodes are semiconductors that generate light and amplify it using repeated reflection or "optical feedback." Once the ...

But it does – and the Tesla Model 3 is the best known. It is, famously, a fully electric car – Tesla doesn’t do petrols, diesels or even hybrids – and it’s the US brand’s smallest and ...

When OpenAI announced a new generative artificial-intelligence (AI) model, called o3, a few days before Christmas, it aroused both excitement and scepticism. Excitement from those who expected its ...

Department of Materials Science and Engineering and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong S.A.R. 999077, People’s Republic of China ...