= Izuo Hayashi
{c}
{tag=Physicist}
= I. Hayashi
{c}
{synonym}
A <physicist> who helped achieve continuous operation of <semiconductor lasers> at room <temperature>. A <double heterostructure> surrounded a thin active layer with different semiconductor layers, reducing the current needed to sustain lasing. This addressed a practical obstacle in early devices and helped make <laser diodes> useful for optical communication and other technologies.https://www.kyotoprize.org/en/laureates/izuo_hayashi/[Achievement digest and citation: 1970 continuous operation and double-heterostructure confinement]{ref}
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