Method for producing a functional structure and component

A method comprising:

• producing a functional structure on an aluminum surface with a local laser treatment of an aluminum surface, wherein
• the local laser treatment is carried out with a pulsed laser system having a pulse duration of from 20 ns to 40 ns,
• an average power of the pulsed laser system is less than 5 kW,
• the functional structure comprises an oxide layer formed on the aluminum surface, the oxide layer having a thickness of from 60 nm to 700 nm,
• a wavelength of the laser system is between 1000 nm and 1100 nm,
• a zone of fusion or zone of thermal influence into the aluminum surface is at most 10 μm, and
• the pulsed laser is applied at a focal position and with a Rayleigh length lying between 10 and 25 mm.