Columbia subject headings:
Angular momentum (Nuclear physics)
Nonlinear optics.
Physical optics.
Harvard subject headings:
Angular momentum.
Electromagnetic waves
Light--Scattering
Photon beams.
Photonics
Physical optics.
Princeton subject headings:
Angular momentum.
Electromagnetic waves.
Light--Scattering.
Photon beams.
Photonics.
Physical optics.