Patent ID: 6828168
Filing Date: 2004-12-07
Classification: B82Y,H01S

Abstract:
A method of fabrication of a Fabry-Perot tunable vertical cavity device comprising first and second distributed Bragg reflector (DBR) stacks with a tunable air-gap cavity therebetween, the method comprising the steps of:(a) forming a spacer above the first DBR stack, wherein said spacer has a structured surface formed by a recess presenting a location for the tunable air-gap cavity; (b) providing a second DBR structure and coupling it to the structured surface of the spacer so as to completely cover said recess by said second DBR structure, thus forming the air-gap cavity between the first DBR stack and the second DBR structure, and; (c) selectively applying material removal to the second DBR structure to form a mesa, presenting the second DBR stack, above a region of said recess, and to form a membrane above said recess outside said second DBR stack, wherein said second DBR structure comprises a supporting structure carrying a layer structure of the second DBR stack, wherein the lateral continuation of the supporting structure within a region thereof outside the region below the mesa forms the membrane completely covering the recess, wherein the thickness of the membrane is about 0.5-1.5 micron.