Jun-ichi Nishizawa

Layers of a PIN diode. (+ -)The PIN photodiode was invented by Jun-ichi Nishizawa in 1950.

was a Japanese engineer and inventor. He is known for his electronic inventions since the 1950s, including the PIN diode, static induction transistor, static induction thyristor, SIT/SITh. His inventions contributed to the development of internet technology and the Information Age. The PIN photodiode was also invented by Nishizawa and his colleagues in 1950.

In 1952, he invented the avalanche photodiode. He then invented a solid-state maser in 1955.

While working at Tohoku University, he proposed fiber-optic communication, the use of optical fibers for optical communication, in 1963. Nishizawa invented other technologies in the 1960s that contributed to the development of optical fiber communications, such as the graded-index optical fiber as a channel for transmitting light from semiconductor lasers. He patented the graded-index optical fiber in 1964.

In 1971, he invented the static induction thyristor.

Recognition Nishizawa was a Life Fellow of the IEEE. He is a Fellow of several other institutions, including the Physical Society, the Russian Academy of Sciences, and the Polish Academy of Sciences. Nishizawa was decorated with Order of Culture by the emperor of Japan in 1989. He also received the Japan Academy Prize (1974), the Honda Prize (1986), and the Laudise Prize of the International Organization for Crystal Growth (1989). IEEE conferred the Edison Medal on him in 2000, and introduced the IEEE Jun-ichi Nishizawa Medal in 2002. He has more than a thousand patents registered under his name.