Silicon on insulator resonator sensors and modulators and...

Details Silicon on insulator resonator sensors and modulators and... Silicon on insulator resonator sensors and modulators and...

2006-08-22

2006-08-22

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C385S012000, C385S030000

Reexamination Certificate

active

07095010

ABSTRACT:
A microsensor for sensing a substance comprises a substrate, a source of light, an optical microresonator or semiconductor optical ring microresonator fabricated in the substrate exposed to the substance to allow an interaction between the microresonator and substance, a waveguide coupling the source of light to the optical microresonator, and a detector coupled to the microresonator to measure the resonant frequency of the microresonator, the absorption loss of whispering gallery modes in the microresonator or the quality factor of the microresonator, which are sensitive to interaction of the substance with the optical microresonator. A polymer coating disposed on the microresonator is reactive with the substance. The microsensor may comprise a plurality of microresonators corresponding to a plurality of different resonant frequencies to generate an absorption spectrum of the substance.

REFERENCES:
patent: 5846708 (1998-12-01), Hollis et al.
patent: 6195187 (2001-02-01), Soref et al.
patent: 6657731 (2003-12-01), Tapalian et al.
patent: 6661938 (2003-12-01), Lim et al.
patent: 6721053 (2004-04-01), Maseeh
patent: 6798947 (2004-09-01), Iltchenko
patent: 2004/0023396 (2004-02-01), Boyd et al.

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