Indium-based alloy and an infrared transducer using such an alloy
AssigneeSagem SA
InventorsChristian Verie, Dominique Lorans, Michel Poirier
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Abstract
The alloy is for making an infrared transducer. It is constituted by (In1−xTlx) (As1−ySby) in which 0≦x<1 and 0<y<1 (where x and y are less than ½). On a GaSb or AlSb substrate, the transducer comprises an active layer of the alloy having a composition such that its lattice is of a size that is equal to that of the substrate material.
Claims8
An alloy for constituting an active layer of an infrared transducer consisting of (In1−xTlx) (As1−ySby) alloy, where 0<x<1 and 0<y<1 and x and y are so selected that a lattice constant of the alloy matches that of a compound selected from the group consisting of GaSb and AlSb.
An infrared transducer for use for detecting infrared in a 3-5 μm infrared band comprising, on a GaSb or an AlSb substrate, an active layer of (In1−xTlx) (As1−ySby) compound where 0≦x<1 and 0<y<1, of a composition such that a lattice constant of the compound of the active layer matches that of the substrate material, the values of x and y being:
- for a GaSb substrate:
- y=7% to 8% x=4% to 5% and
- for a AlSb substrate:
- y=18% to 19% x=0%.
An infrared transducer comprising, on a substrate of GaSb or AlSb compound, an active layer of (In1−xTlx) (As1−ySby) alloy where 0<x<1 and 0<y<1 and x and y are such that a lattice constant of the alloy matches that of the substrate compound.
Dependencies are inferred from the claim text.