发明名称 |
Quantum well optical waveguide phase shifter |
摘要 |
The present invention is achieved by layering a dielectric slab between a ground plane and a two dimensional quasi quantum well heterostructure and by switching between an unbiased state and a negative potential which is established between the quantum well heterostructure and the ground plane. In the unbiased state, the device supports wave propagation in the dielectric with a phase velocity similar to that of a wave propagating in a parallel plate waveguide. Upon application of the bias voltage, that is establishing a negative potential difference between contacts based on either side of the quantum well heterostructure, the conductivity of the quantum well decreases. Therefore, as the carrier wave propagates the wave interacts with a boundary similar to that of a dielectric-air interface. This new boundary condition, in turn, produces a faster phase velocity. Hence, toggling the bias modulates the quantum well conductivity which changes the phase velocity of the carrier wave.
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申请公布号 |
US5811830(A) |
申请公布日期 |
1998.09.22 |
申请号 |
US19950482154 |
申请日期 |
1995.06.08 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE ARMY |
发明人 |
DUBEY, MADAN;CUI, HONG LIANG;HECHTMAN, CHARLES D.;HORING, NORMAN J.;MCLANE, GEORGE F. |
分类号 |
G02F1/017;G02F1/025;(IPC1-7):G02F1/015 |
主分类号 |
G02F1/017 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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