In the current issue of the Photonics Letters of Poland, one may find papers related to different aspects of photonics like a numerical study on standard slot waveguide and double hybrid plasmonic waveguide based on a silicon-on-insulator platform; numerical investigations on a plasmonic sensor established on metal-insulator-metal waveguide configuration for refractive index sensing applications; the analyses of a laser dazzle generating three overlapping laser beams of different colors; the design and development of the LED-based lamp with adjustable spectrum; discussion on a Graphene-Molybdenum Disulphide Chitin Nanocomposite based passive Q-switcher.