US 12,189,270 B2
Y-branch type phase-change all-optical boolean logic device and all-binary logic implementation method therefor
Xiaomin Cheng, Hubei (CN); Zhuli He, Hubei (CN); Yunlai Zhu, Hubei (CN); Han Li, Hubei (CN); and Xiangshui Miao, Hubei (CN)
Assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Appl. No. 18/577,702
Filed by HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
PCT Filed Sep. 7, 2021, PCT No. PCT/CN2021/116821
§ 371(c)(1), (2) Date Jan. 9, 2024,
PCT Pub. No. WO2023/284089, PCT Pub. Date Jan. 19, 2023.
Claims priority of application No. 202110786681.9 (CN), filed on Jul. 12, 2021.
Prior Publication US 2024/0319563 A1, Sep. 26, 2024
Int. Cl. G02F 3/02 (2006.01); G11C 13/00 (2006.01); H03K 19/173 (2006.01)
CPC G02F 3/022 (2013.01) [G11C 13/0004 (2013.01); H03K 19/173 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A Y-branch phase-change all-optical Boolean logic device comprising:
a Y-branch waveguide and two phase-change function units;
wherein each of two Y branches of the Y-branch waveguide has one protruding ridge; each of the two phase-change function units respectively cover the one protruding ridge; based on an evanescent wave coupling effect, when an optical pulse signal having a high power is input into the Y-branch waveguide, each of the two phase-change function units absorbs a part of optical power and produces a crystallization phase change or an amorphization phase change to realize a write operation; reading of a crystallization state of each of the two phase-change function units is achieved through different transmittances that the two phase-change function units have for a detection optical signal in the crystalline state or an amorphous state;
through write and read operations on the two phase-change function units, the Y-branch phase-change all-optical Boolean logic device realizes all 16 binary Boolean logic operations.