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Leo Esaki

12 March 1925 – present

Leo Esaki is a Japanese physicist who discovered electron tunnelling in semiconductors and invented the tunnel (Esaki) diode while working at Sony in the 1950s. He shared the 1973 Nobel Prize in Physics with Ivar Giaever and Brian Josephson, spent more than three decades at IBM in the United States, and later served as president of the University of Tsukuba.

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Life events

Born in Osaka, Japan
12 March 1925

Leo Esaki (Esaki Reona) was born in Osaka.

Source: en.wikipedia.org
Birth ✓
Graduated in physics from the University of Tokyo
1947

He received his bachelor's degree in physics from the University of Tokyo and later completed a doctorate there in 1959.

Source: en.wikipedia.org
Education ✓
Joined Tokyo Tsushin Kogyo (later Sony)
1956

After several years at Kobe Kogyo, he moved to the company that became Sony to work on semiconductor research.

Source: en.wikipedia.org
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Discovered electron tunnelling in semiconductors and invented the tunnel diode
1957

His work on heavily doped germanium p-n junctions revealed quantum tunnelling and led to the Esaki diode.

Source: en.wikipedia.org
Achievement ✓
Moved to the United States to join IBM
1960

He joined the IBM Thomas J. Watson Research Center in New York, where he was later named an IBM Fellow.

Source: en.wikipedia.org
Relocation ✓
Awarded the Nobel Prize in Physics
1973

He shared the prize with Ivar Giaever and Brian Josephson for experimental discoveries regarding tunnelling phenomena in solids.

Source: en.wikipedia.org
Achievement ✓
Received Japan's Order of Culture
1974

He was decorated with the Order of Culture by the Japanese government.

Source: en.wikipedia.org
Achievement ✓
Returned to Japan as president of the University of Tsukuba
1992 – 1998

After more than three decades at IBM, he led the University of Tsukuba until 1998.

Source: en.wikipedia.org
Career ✓
Awarded the Japan Prize
1998

He received the Japan Prize for his work on superlattices and quantum wells.

Source: en.wikipedia.org
Achievement ✓