COLLEGE PARK, Maryland, Sept. 27 -- Applied Physics Letters, a journal from the American Institute of Physics, published research articles, including the following topics, in its Sept. 27, 2021 edition:

PHOTONICS AND OPTOELECTRONICS:

* Femtosecond laser direct writing continuous phase vortex gratings with proportionally distributed diffraction energy

* Dynamic regulating of lasing mode in a whispering-gallery microresonator by thermo-optic effect