| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser element and a laser beam deflector, capable of emitting a laser beam in a prescribed direction and changing an emission direction thereof.SOLUTION: A semiconductor laser element comprises: a layer structure 100 including a lower clad layer, an upper clad layer, an active layer interposed between the lower clad layer and the upper clad layer, a photonic crystal layer, and a plurality of drive electrodes for supplying driving current to a plurality of regions in the active layer; and a coating film 101 formed on a light emission end surface LES of the layer structure 100. A film thickness d in positions corresponding to a plurality of regions of the coating film 101 is set according to a refractive angle which is an angle formed between a laser beam refraction direction in the positions corresponding to the plurality of regions and a normal line of a light emission end surface LES so that laser beam amplitude reflectance on a coating film surface CFS becomes a desired value. |
