Editing Laser (section)

=== Photonic crystal lasers ===

[[Photonic crystal]] lasers are lasers based on nano-structures that provide the mode confinement and the [[Density of states|density of optical states]] (DOS) structure required for the feedback to take place.{{Clarify|date=February 2009}} They are typical micrometer-sized{{dubious|date=November 2010}} and tunable on the bands of the photonic crystals.<ref>{{cite journal |title=Ultraviolet photonic crystal laser |first=X. |last=Wu |volume=85 |issue=17 |date=October 25, 2004|journal=Applied Physics Letters |doi=10.1063/1.1808888|arxiv = physics/0406005 |bibcode = 2004ApPhL..85.3657W |page=3657 |s2cid=119460787 |display-authors=etal}}</ref>{{Clarify|date=February 2009}}