Tuning D* with Modified Thermal Detectors
First Claim
1. A method for adjusting the spectral detectivity of a thermal detector, comprising:
- providing a thermal detector having a light sensitive portion;
coating the light sensitive portion with a first material to reduce the broadband response of the detector; and
coating the first material with a second material having spectral absorption characteristics,whereby the spectral absorbance of the second material primarily determines the thermal conversion of the thermal detector.
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Accused Products
Abstract
Disclosed is apparatus and methodology for producing thermal detectors with spectral responsivities that mimic the absorptions of chemical analytes, and whose detector characteristics approach those of conventional broad-band thermal detectors. In an exemplary arrangement, the methodology provides for modification of a known Si-based thermal detector by adding a near-infrared dye absorbing film above a reflector deposited directly on the thermal detector element. The method is general to all types of thermal detectors that can be divided into separate absorber and thermal sensor components.
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Citations
20 Claims
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1. A method for adjusting the spectral detectivity of a thermal detector, comprising:
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providing a thermal detector having a light sensitive portion; coating the light sensitive portion with a first material to reduce the broadband response of the detector; and coating the first material with a second material having spectral absorption characteristics, whereby the spectral absorbance of the second material primarily determines the thermal conversion of the thermal detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A thermal detector, comprising:
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a light sensitive detector material; a layer of light reflecting material covering at least a portion of the light sensitive material; and a layer of spectral absorption material covering said light reflecting material. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification