A method for making/growing an array of carbon nanotubes includes the steps of: (a) providing a substrate; (b) forming a light absorption film made of a light absorption material on the substrate; (c) forming a catalyst film on the light absorption film; (d) introducing a mixture of a carrier gas and a carbon source gas by flowing the mixture over/across the catalyst film; (e) focusing a laser beam on the light absorption film to locally heat the catalyst to a predetermined/reaction temperature; and (f) growing an array of the carbon nanotubes from the substrate.