Silicon Photonics Research in Hong Kong: Microresonator Devices and Optical Nonlinearities

Andrew W. POON; Linjie ZHOU; Fang XU; Chao LI; Hui CHEN; Tak-Keung LIANG; Yang LIU; Hon K. TSANG

doi:10.1093/ietele/e91-c.2.156

Special Section on Silicon Photonics Technologies and Their Applications

Silicon Photonics Research in Hong Kong: Microresonator Devices and Optical Nonlinearities

Andrew W. POON, Linjie ZHOU, Fang XU, Chao LI, Hui CHEN, Tak-Keung LIANG, Yang LIU, Hon K. TSANG

Author information

Andrew W. POON
Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology
Linjie ZHOU
Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology
Fang XU
Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology
Chao LI
Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology
Hui CHEN
Photonic Device Laboratory, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology
Tak-Keung LIANG
Department of Electronic Engineering, The Chinese University of Hong Kong
Yang LIU
Department of Electronic Engineering, The Chinese University of Hong Kong
Hon K. TSANG
Department of Electronic Engineering, The Chinese University of Hong Kong

Keywords: silicon microresonator, microring resonator, microdisk resonator, cross-connect filter, format converter, silicon modulator, reconfigurable add-drop filter, electro-optic logic switch, free-carrier plasma dispersion, interferometric resonance control, two photon absorption, optical limiting, silicon amplifier, wavelength conversion, helium implantation

JOURNAL RESTRICTED ACCESS

2008 Volume E91.C Issue 2 Pages 156-166

DOI https://doi.org/10.1093/ietele/e91-c.2.156

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Abstract

In this review paper we showcase recent activities on silicon photonics science and technology research in Hong Kong regarding two important topical areas-microresonator devices and optical nonlinearities. Our work on silicon microresonator filters, switches and modulators have shown promise for the nascent development of on-chip optoelectronic signal processing systems, while our studies on optical nonlinearities have contributed to basic understanding of silicon-based optically-pumped light sources and helium-implanted detectors. Here, we review our various passive and electro-optic active microresonator devices including (i) cascaded microring resonator cross-connect filters, (ii) NRZ-to-PRZ data format converters using a microring resonator notch filter, (iii) GHz-speed carrier-injection-based microring resonator modulators and 0.5-GHz-speed carrier-injection-based microdisk resonator modulators, and (iv) electrically reconfigurable microring resonator add-drop filters and electro-optic logic switches using interferometric resonance control. On the nonlinear waveguide front, we review the main nonlinear optical effects in silicon, and show that even at fairly modest average powers two-photon absorption and the accompanied free-carrier linear absorption could lead to optical limiting and a dramatic reduction in the effective lengths of nonlinear devices.

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