Patent ID: 7292383

Claim:
An efficient resonant cavity comprising: a partially transmissive and partially reflective first surface; a partially transmissive and partially reflective second surface; and one or more substantially reflective sidewalls positioned between said first surface and said second surface, wherein said first surface and said second surface are substantially parallel; said first surface represents with an input surface of said resonant cavity; said second surface represents an output surface of said contained resonant cavity; said resonant cavity is a contained resonant cavity; said one or more sidewalls are oriented approximately perpendicular to said first surface and said second surface; said one or more sidewalls include a first sidewall and a second sidewall having a first substantially reflective planar surface and a second substantially reflective planar surface, respectively wherein said first substantially reflective planar surface faces said second substantially reflective planar surface; and wherein said one or more sidewalls further include: a third sidewall and a fourth sidewall having a third substantially reflective planar surface and a fourth substantially reflective planar surface. respectively, said third substantially reflective planar surface facing said fourth substantially reflective planar surface; and plural reflective sidewalls arranged perpendicularly between said first surface and said second surface, thereby forming an array of contained resonant cavities therebetween.