Author(s): He, L (He, Lu); Zhang, FR (Zhang, Furong); Zhang, HZ (Zhang, Huizhen); Kong, LJ (Kong, Ling-Jun); Zhang, WX (Zhang, Weixuan); Xu, XS (Xu, Xingsheng); Zhang, XD (Zhang, Xiangdong)

Source: ACS PHOTONICS DOI: 10.1021/acsphotonics.1c01569 Early Access Date: JAN 2022

Abstract: The realization of all-optical integration and optical computing has always been our goal. One of the most significant challenges is to make integrated all-optical logic devices as small as possible. Here, we report the implementation of ultracompact all-optical logic devices and integrated chips on silicon photonic platforms by topology optimization. The footprint for the fabricated all-optical logic gates with XOR and OR functions is only 1.3 x 1.3 mu m(2) (similar to 0.84 lambda x 0.84 lambda) that are the smallest all-optical dielectric logic devices ever verified in experiments in the optical communication range. The ultralow loss of the optical signal is also demonstrated experimentally (-0.96 dB). Furthermore, an integrated chip containing seven major logic gates (AND, OR, NOT, NAND, NOR, XOR, and XNOR) and a half adder is fabricated, where the associated footprint is only 1.3 x 4.5 mu m(2). Our work opens up a new path toward practical all-optical integration and optical computing.

Accession Number: WOS:000752572700001

Author Identifiers:

Author Web of Science ResearcherID ORCID Number

He, Lu 0000-0002-5458-9661

ISSN: 2330-4022

Full Text: https://pubs.acs.org/doi/10.1021/acsphotonics.1c01569