Guest Editors:

Christopher Doerr
Roel Baets

Special Issue Papers

Scanning the Issue

By C. R. Doerr and R. Baets

The Emergence of Silicon Photonics as a Flexible Technology Platform

By X. Chen, M. M. Milosevic, S. Stankovi´c, S. Reynolds, T. D. Bucio, K. Li, D. J. Thomson, F. Gardes, and G. T. Reed

This paper presents a brief history of the field of silicon photonics, encompassing a discussion of the key devices, with a focus on the key performance milestones that were instrumental in demonstrating the potential of silicon photonics.

Advanced Passive Silicon Photonic Devices With Asymmetric Waveguide Structures

By D. Dai

This paper reviews advanced passive devices in silicon photonics, such as on-chip polarization-handling devices, mode converters/(de)multiplexers, microring-resonator optical filters/switches, all taking advantage of the high index contrast and asymmetric silicon-based waveguide structures.

Subwavelength-Grating Metamaterial Structures for Silicon Photonic Devices

By R. Halir, A. Ortega-Moñux, D. Benedikovic, G. Z. Mashanovich, J. G. Wangüemert-Pérez, J. H. Schmid, Í. Molina-Fernández, and P. Cheben

Building on the improvements in high-resolution lithography for silicon, one can create artificial dielectrics, periodic structures in silicon photonics with periods substantially smaller than a wavelength of light in the material. This paper discusses the theory and applications of these subwavelength structures.

High-Speed Silicon Photonics Modulators

By J. Witzens

This paper reviews optical modulators in silicon, which has become a very rich topic, including Mach–Zehnder modulators and ring modulators. The tradeoffs in design to achieve high speed with minimal drive voltage and insertion loss are studied.

Photonic Crystal Devices in Silicon Photonics

By T. Asano and S. Noda

This paper reviews the history of 2-D photonic crystal slabs based on silicon photonics, focusing on ultrasmall cavities with ultrahigh-quality factor, and their applications as add/drop filters and Raman lasers. Ways to establish strong coupling between distant nanocavities are also discussed.

Parametric Nonlinear Silicon-Based Photonics

By K. Li and A. C. Foster

This paper discusses nonlinear optics in silicon photonics. Because of the tight optical confinement, very compact nonlinear devices can be made in silicon photonics. Applications include the generation of octavespanning optical frequency combs for making precise clocks.

Silicon Nitride in Silicon Photonics

By D. J. Blumenthal, R. Heideman, D. Geuzebroek, A. Leinse, and C. Roeloffzen

This paper reviews the state of the art of silicon nitride waveguide platforms, with their capabilities complimentary to those of silicon-ininsulator platforms, among others, with respect to the loss levels and the power handling properties.

Monolithically Integrated Multilayer Silicon Nitride-on-Silicon Waveguide Platforms for 3-D Photonic Circuits and Devices

By W. D. Sacher, J. C. Mikkelsen, Y. Huang, J. C. C. Mak, Z. Yong, X. Luo, Y. Li, P. Dumais, J. Jiang, D. Goodwill, E. Bernier, P. G.-Q. Lo, and J. K. S. Poon

This paper discusses multilayer platforms using silicon nitride and silicon waveguides. This technology allows 3-D photonic circuits to be created.

Photonic Integrated Circuits Using Heterogeneous Integration on Silicon

By T. Komljenovic, D. Huang, P. Pintus, M. A. Tran, M. L. Davenport, and J. E. Bowers

This paper focuses on oxide bonding of III–V semiconductors and magneto–optic materials.

Heterogeneous Integration on Silicon Photonics

By O. Marshall, M. Hsu, Z. Wang, B. Kunert, C. Koos, and D. Van Thourhout

This paper focuses on other material combinations (a.o. PZT, BTO, and graphene) as well as hetero–epitaxial growth of III–V semiconductors.

Optical Interfaces for Silicon Photonic Circuits

By D. Vermeulen and C. V. Poulton

One of the biggest challenges in silicon photonics is coupling the very small optical mode in silicon wire waveguides to the much larger optical mode of single-mode fibers in an efficient manner. This paper discusses in detail the various approaches reported and deployed in industry today.

High-Volume Manufacturing Platform for Silicon Photonics

By T. Pinguet, S. Denton, S. Gloeckner, M. Mack, G. Masini, A. Mekis, S. Pang, M. Peterson, S. Sahni, and P. De Dobbelaere

This paper discusses the factors that are at stake to bring a low-cost, low-power, high-performance, and high-volume optical transceiver to the market. Also, the pros and cons of monolithic and hybrid electronics/photonics integration are discussed.

Silicon Photonics in Optical Coherent Systems

By C. Doerr and L. Chen

Silicon photonics is especially suited for advanced modulation format transmitters and coherent reception, because of the large number of required integrated optical components. This paper focuses on industry deployments of silicon photonics in optical coherent communications today and tomorrow

Mid-Infrared (Mid-IR) Silicon-Based Photonics

By J.-M. Fedeli and S. Nicoletti

This paper reviews the state of the art in silicon-based midIR integrated photonics and discusses the waveguide platforms as well as the options to integrate mid-IR light sources in such platforms. The route toward applications in the field of chemical sensing, IR spectroscopy and imaging, freespace communications, etc., is also covered.

Open-Access Silicon Photonics: Current Status and Emerging Initiatives

By A. Rahim, T. Spuesens, R. Baets, and W. Bogaerts

Silicon photonic devices are usually fabricated in large foundries that serve multiple customers. Silicon photonics takes advantage of these open-access silicon electronics foundries. This paper discusses this ecosystem and its evolution.

Point of View

Scanning Our Past

Debugging the ENIAC

By B. L. Stuart