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The carriers are arranged adjacently in such a way that the line-shaped emission regions of the diode lasers are adjacent in series and the p-n junction planes extend parallel to the thermal contact surfaces.
After the wells are ‘dug’ with an etching technique, their insides are coated with a material to form a p-n junction just a tenth of a micron thick, which is the best thickness to induce a current.
When an electric current flows across the p-n junction , electrons and holes recombine, emitting photons.
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