A new chip-scale spectrometer challenges the long-standing reliance on bulky optical systems by replacing physical light ...

Using NASA's Chandra X-ray space telescope, astronomers have performed high-resolution X-ray spectroscopic observations of a ...

Excitons are commonly regarded as massive composite quasiparticles. Now, experiments show that, in two-dimensional materials, light–matter interactions can turn excitons into massless collective modes ...