A significant letter written by founding father Thomas Jefferson sold Friday for the asking price of $90,000 and will return to Maryland, the state where it was penned 242 years ago. The letter, ...

Metamaterial designs are typically limited to operation over a narrow bandwidth dictated by the resonant line width. Here we report a compliant metamaterial with tunability of Δλ ∼ 400 nm, greater ...

Letters to the editor, June 17, 2025South Africa has been full of talk for decades – commissions, inquiries, conferences, committees. What came of the R1-billion Zondo Commission? Were any big ...

The physical, chemical, and biological properties of nanostructures depend strongly on their geometrical dimensions. Here we present a fast, noninvasive, simple-to-perform, purely optical method that ...