Electrostatically-controlled cantilever apparatus for continuous tuning of the resonance wavelength of a fabry-perot cavity
First Claim
1. A cantilever apparatus for tuning a resonance wavelength of a Fabry-Perot cavity, said Fabry-Perot cavity comprising a bottom reflecting means and a top reflecting means, said cantilever apparatus comprising:
- a) an electrically responsive substrate;
b) a support block positioned on said electrically responsive substrate;
c) a cantilever structure comprising a base section resting on said support block, a deformable section extending above said electrically responsive substrate and creating an air gap between said deformable section and said electrically responsive substrate, and an active head positioned at a predetermined location on said deformable section and comprising at least a portion of said top reflecting means;
d) an electrical tuning contact disposed on said cantilever structure for applying a first tuning voltage Vt1 to produce a vertical electrostatic force Fd between said electrical tuning contact and said electrically responsive substrate, thereby altering the size of said air gap and tuning said resonant wavelength.
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Accused Products
Abstract
An electrostatically controlled cantilever apparatus for continuous tuning of the resonance wavelength of a Fabry-Perot cavity is disclosed. A resonant cavity is formed between two distributed Bragg reflector (DBR) mirrors. The top reflector is composed of a movable top DBR supported in a freely suspended cantilever, a variable-thickness air spacer layer and a fixed DBR. The bottom reflector is fixed on the substrate. By applying a tuning voltage to create electrostatic attraction, the cantilever may be deflected towards the substrate, thereby changing the thickness of the air spacer layer and consequently the resonant wavelength of the Fabry-Perot cavity.
92 Citations
25 Claims
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1. A cantilever apparatus for tuning a resonance wavelength of a Fabry-Perot cavity, said Fabry-Perot cavity comprising a bottom reflecting means and a top reflecting means, said cantilever apparatus comprising:
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a) an electrically responsive substrate; b) a support block positioned on said electrically responsive substrate; c) a cantilever structure comprising a base section resting on said support block, a deformable section extending above said electrically responsive substrate and creating an air gap between said deformable section and said electrically responsive substrate, and an active head positioned at a predetermined location on said deformable section and comprising at least a portion of said top reflecting means; d) an electrical tuning contact disposed on said cantilever structure for applying a first tuning voltage Vt1 to produce a vertical electrostatic force Fd between said electrical tuning contact and said electrically responsive substrate, thereby altering the size of said air gap and tuning said resonant wavelength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for tuning a resonance wavelength of a Fabry-Perot cavity using a cantilever structure comprising a base section, a deformable section, and an active head, said Fabry-Perot cavity comprising a bottom reflecting means and a top reflecting means, said method comprising the steps of:
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a) positioning a support block on an electrically responsive substrate containing said Fabry-Perot cavity; b) producing said cantilever structure on said support block such that said active head contains at least a portion of said top reflecting means and is positioned above said Fabry-Perot cavity, and said deformable section extends above said electrically responsive substrate and creates an air gap between said deformable section and said electrically responsive substrate; c) disposing an electrical tuning contact on said cantilever structure; d) applying a first tuning voltage Vt1 to produce a vertical electrostatic force Fd between said electrical tuning contact and said electrically responsive substrate, thereby altering the size of said air gap and tuning said resonant wavelength. - View Dependent Claims (24, 25)
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Specification