I GREATLY regret that in a note of mine on a “new mode of using the concave diffraction grating,” in the “Astronomical Column” of March 22 (p. 501), I wrongly interpreted a sentence of Prof Rizzo's ...

Researchers present a novel ion-trap chip integrating photonics for efficient fluorescence photon collection, enhancing ...

Without contrast, any inherent spatial resolution of a microscope is useless. It is thus the contrast mechanism that often imparts unique capabilities to a microscopy technique. Such uniqueness can be ...