Abstract

We provide an overview of our recent work on developing subwavelength grating (SWG) waveguide devices as an enabling technology for integrated microwave photonics. First, we describe wavelength-selective SWG waveguide filters, including ring resonators, Bragg gratings, and contradirectional couplers. Second, we discuss the development of an index variable optical true time delay line that exploits spatial diversity in an equal-length waveguide array. These SWG waveguide components are fundamental building blocks for realizing more complex structures for advanced microwave photonic signal processing.

© 2016 Chinese Laser Press

On-chip optical true time delay lines based on subwavelength grating waveguides

Yue Wang, Hao Sun, Mostafa Khalil, Wei Dong, Ivana Gasulla, José Capmany, and Lawrence R. Chen
Opt. Lett. 46(6) 1405-1408 (2021)

Subwavelength grating filtering devices

Junjia Wang, Ivan Glesk, and Lawrence R. Chen
Opt. Express 22(13) 15335-15345 (2014)

Silicon photonic contradirectional couplers using subwavelength grating waveguides

Behnam Naghdi and Lawrence R. Chen
Opt. Express 24(20) 23429-23438 (2016)

Subwavelength-grating contradirectional couplers for large stopband filters

Dominique Charron, Jonathan St-Yves, Omid Jafari, Sophie LaRochelle, and Wei Shi
Opt. Lett. 43(4) 895-898 (2018)

Mid-infrared silicon photonic waveguides and devices [Invited]

Yi Zou, Swapnajit Chakravarty, Chi-Jui Chung, Xiaochuan Xu, and Ray T. Chen
Photon. Res. 6(4) 254-276 (2018)