Scientists invent topological-cavity surface-emitting laser

Semiconductor lasers are the most widely used lasers due to their compact size, high efficiency, low cost and wide spectra. But they suffer low output power and low beam quality—two specifications difficult to improve simultaneously. ...

Innovations in sustainable fashion

The global fashion sector, mainly the apparel and footwear industry, produced more greenhouse gases than France, Germany, and the UK combined in 2018, around 2.1 billion metric tons of CO2 emissions—approximately 4% of ...

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