After four centuries of advances, astronomers now capture the Sun’s swirling, dynamic features in stunning detail.

Figure 1 (a) Concept of a 1D space-time hopfion crystal. (b) Spin textures on x-y transverse cross-section and (c) that on selective longitudinal cross-sections through the center of a unit hopfion ...

Abstract: The paper considers the issue of increasing the efficiency of using higher diffraction orders of an amplitude transmitting diffraction grating for the purposes of spectral analysis of ...

Sound idea: laser light passes between a ultrasound transducer-reflector array that creates a Bragg grating of air. The laser beam interacts with this grating and is deflected without travelling ...

Diffraction spikes, visible in high-power astronomical images, are an intrinsic optical phenomenon in reflecting telescopes, primarily caused by the diffraction and subsequent interference of incoming ...

1 Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China. 2 University of Chinese Academy of Sciences, Beijing, China. With the continuous improvement ...

Make a truth teller for light. Turn an old CD into a spectroscope to analyze light—you may be surprised by what you see. Try pointing your CD spectroscope at the fluorescent light in your room, sunlit ...

Spectrographs are important tools for studying many biological and chemical processes and substances, from pigments to plant growth and nucleic acids to pharmaceuticals, providing information about ...

A wide mode-hopping free and narrow linewidth tunable laser diode source with a Littman-Metcalf arrangement based on a diffraction grating is presented. Several experiments are carried out to ...