US 11,747,562 B2
Waveguide absorbers
Yusheng Bian, Ballston Lake, NY (US)
Assigned to GLOBALFOUNDRIES U.S. INC., Malta, NY (US)
Filed by GLOBALFOUNDRIES U.S. INC., Malta, NY (US)
Filed on May 6, 2022, as Appl. No. 17/738,156.
Application 17/738,156 is a continuation of application No. 17/031,032, filed on Sep. 24, 2020, granted, now 11,353,654.
Prior Publication US 2022/0260778 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 6/124 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/124 (2013.01) [G02B 2006/12061 (2013.01); G02B 2006/12126 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a waveguide absorber with a grating pattern, wherein the waveguide absorber comprises alternating wide regions and narrow regions, and the grating pattern is a gap between a pair of the wide regions and adjacent to the narrow region between the pair of the wide regions,
wherein the waveguide absorber is provided in a spiral configuration and the spiral configuration comprises concentrically placed rounded turns.