发明名称 |
Co-integration of photonic devices on a silicon photonics platform |
摘要 |
Disclosed are methods for co-integration of active and passive photonic devices on a planarized silicon-based photonics substrate. In one aspect, a method is disclosed that includes providing a planarized silicon-based photonics substrate comprising a silicon waveguide structure, depositing a dielectric layer over the planarized silicon-based photonics substrate, selectively etching the dielectric layer, thereby exposing at least a portion of the silicon waveguide structure, selectively etching the exposed portion of the silicon waveguide structure to form a template, using the silicon waveguide structure as a seed layer to selectively grow in the template a germanium layer that extends above the dielectric layer, and planarizing the germanium layer to form a planarized germanium layer, wherein the planarized germanium layer does not extend above the dielectric layer. |
申请公布号 |
US8741684(B2) |
申请公布日期 |
2014.06.03 |
申请号 |
US201213466766 |
申请日期 |
2012.05.08 |
申请人 |
IMEC;Universiteit Gent |
发明人 |
Bogaerts Wim;Van Campenhout Joris;Verheyen Peter;Absil Philippe |
分类号 |
H01L31/18;H01L31/0352;H01L31/12 |
主分类号 |
H01L31/18 |
代理机构 |
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代理人 |
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主权项 |
1. A method comprising:
providing a planarized silicon-based photonics substrate comprising a silicon waveguide structure; depositing a dielectric layer over the planarized silicon-based photonics substrate; selectively etching the dielectric layer, thereby exposing at least a portion of the silicon waveguide structure; selectively etching the exposed portion of the silicon waveguide structure to form a step-like template; using the silicon waveguide structure as a seed layer to selectively grow in the step-like template a germanium layer that extends above the dielectric layer; and planarizing the germanium layer to form a planarized germanium layer, wherein the planarized germanium layer does not extend above the dielectric layer and, as a result of the step-like template, has an inverted rib shape, wherein the inverted rib shape comprises a lower portion and an upper portion that is wider than the lower portion, wherein the lower portion comprises an optically-active region, and wherein the upper portion comprises laterally-overhanging portions that extend laterally above and beyond either side of the optically active region lower portion.
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地址 |
Leuven BE |