发明名称 |
Surface parallel modulator |
摘要 |
SiGe quantum wells where the well material has a lowest conduction band energy minimum at k=0 (the Gamma point of the first Brillouin zone) are provided. Quantum well structures that satisfy this condition have "Kane-like" bands at and near k=0 which can provide physical effects useful for various device applications, especially optical modulators. In the Si<SUB>1-x</SUB>Ge<SUB>x </SUB>material system, this condition on the band structure is satisfied for x greater than about 0.7. The quantum well barrier composition may or may not have Kane-like bands. Embodiments of the invention having a surface parallel configuration are especially suitable for use in fiber coupled devices. Such surface parallel devices have light propagating in the plane of the quantum wells, in a device geometry that is preferably not single-mode waveguided.
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申请公布号 |
US7457487(B2) |
申请公布日期 |
2008.11.25 |
申请号 |
US20060524530 |
申请日期 |
2006.09.19 |
申请人 |
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY |
发明人 |
MILLER DAVID A. B.;KUO YU-HSUAN;HARRIS, JR. JAMES S. |
分类号 |
G02F1/035;G02B6/26 |
主分类号 |
G02F1/035 |
代理机构 |
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主权项 |
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地址 |
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