section_path: Types and operating principles/Photonic crystal lasers
section_name: Photonic crystal lasers
paragraph_text: Photonic crystal lasers
  
  Photonic crystal lasers are lasers based on nano-structures that provide the mode confinement and the density of optical states (DOS) structure required for the feedback to take place. They are typical micrometer-sized and tunable on the bands of the photonic crystals.