Coherent transfer of light polarization to electron spins in a semiconductor

被引：108

作者：

Kosaka, Hideo ^{[1
,2
]}

Shigyou, Hideki ^{[1
]}

Mitsumori, Yasuyoshi ^{[1
,2
]}

Rikitake, Yoshiaki ^{[2
,3
]}

Imamura, Hiroshi ^{[2
,3
]}

Kutsuwa, Takeshi ^{[2
]}

Arai, Koichiro ^{[2
,4
]}

Edamatsu, Keiichi ^{[1
]}

机构：

[1] Tohoku Univ, Res Inst Elect Commun, Lab Nanoelect & Spintron, Sendai, Miyagi 9808577, Japan

[2] CREST JST, Kawaguchi, Saitama 3320012, Japan

[3] AIST, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058568, Japan

[4] JST, ERATO Semicond Spintron Project, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.100.096602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that the superposition of light polarization states is coherently transferred to electron spins in a semiconductor quantum well. By using time-resolved Kerr rotation, we observe the initial phase of Larmor precession of electron spins whose coherence is transferred from light. To break the electron-hole spin entanglement, we utilized the big discrepancy between the transverse g factors of electrons and light-holes. The result encourages us to make a quantum media converter between flying photon qubits and stationary electron-spin qubits in semiconductors.

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页数：4

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