WPhotonics
WACS Photonics
WBreit–Wheeler process
WChromo-modal dispersion
WCoherent perfect absorber
WDiffraction grating
WOptical DPSK demodulator
WFiber-optic communication
WFrequency selective surface
WHybrid plasmonic waveguide
WLaser
WMonte Carlo method for photon transport
WOptical rogue waves
WOptomechanics
WOrbital angular momentum multiplexing
WOrganic photonics
WPHOSFOS
WPhotoemission spectroscopy
WPhoton counting
WPhotonic crystal
WPhotonic curing
WPhotonic metamaterial
WPhotonic-crystal fiber
WPolarization-division multiplexing
WSilicon photonics
WSlot-waveguide
WSolar sail
WSubwavelength-diameter optical fibre