US 12,140,826 B2
Tunable diffraction gratings using surface acoustic waves
Yen-Hung Wu, Pasadena, CA (US); Stewart Sherrit, Montrose, CA (US); Valerie Scott Kristof, Pasadena, CA (US); Mina Rais-Zadeh, Pasadena, CA (US); and Mustafa B. Coskun, Pasadena, CA (US)
Assigned to California Institute of Technology, Pasadena, CA (US)
Filed by California Institute of Technology, Pasadena, CA (US)
Filed on Aug. 9, 2021, as Appl. No. 17/397,767.
Claims priority of provisional application 63/063,698, filed on Aug. 10, 2020.
Prior Publication US 2022/0043288 A1, Feb. 10, 2022
Int. Cl. G02F 1/11 (2006.01); H03H 9/02 (2006.01); H03H 9/145 (2006.01); H03H 9/25 (2006.01)
CPC G02F 1/113 (2013.01) [H03H 9/02881 (2013.01); H03H 9/14541 (2013.01); H03H 9/25 (2013.01); G02F 2201/124 (2013.01); H03H 9/02559 (2013.01); H03H 9/14502 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A tunable diffraction grating comprising:
a piezoelectric substrate comprising an interdigital transducer (IDT) region and a delay line region; and
a plurality of IDT electrodes positioned in the IDT region,
wherein the plurality of IDT electrodes are each individually addressable such that the signal applied to each of the plurality of IDT electrodes is phase shifted, and
wherein the plurality of IDT electrodes provide the phase shifted signal to induce surface acoustic waves in the piezoelectric substrate in a pattern which produces a grating in the delay line region.