Lukas Chrostowski

University of British Columbia

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Nicolas A. F. Jaeger

University of British Columbia

157

Sudip Shekhar

University of British Columbia

Han Yun

Mongolian University of Science and Technology

Wei Shi

Université Laval

Jonas Flueckiger

International Society for Optics and Photonics

Xu Wang

North China University of Water Resources and Electric Power

Mustafa Hammood

University of British Columbia

Hasitha Jayatilleka

University of British Columbia

Karen C. Cheung

University of British Columbia

Zeqin Lu

Ansys (Canada)

Cooperative Institutions

University of British Columbia

214

Institute of Electrical and Electronics Engineers

140

Canadian Standards Association

112

McGill University

Gorgias Press (United States)

Chinese Academy of Sciences

Centre National de la Recherche Scientifique

Massachusetts Institute of Technology

University of Toronto

Zhejiang University

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Enhancement of dynamic range in 1.55-μm VCSELs using injection locking

IEEE Photonics Technology Letters (2003)

Lukas Chrostowski Chih‐Hao Chang C.J. Chang-Hasnain

Injection locking is demonstrated to improve the analog performance of long wavelength vertical-cavity surface-emitting lasers. The third-harmonic dynamic range was improved by /spl sim/20 dB/spl middot/Hz/sup 2/3/ to be /spl sim/94 dB/spl middot/Hz/sup 2/3/, and the modulation bandwidth was increased two fold. The locking conditions are studied and show that the improvement is present over a wide range of injection power and wavelength detuning.

Injection locking

Vertical-cavity surface-emitting laser

Mode-Locking

10.1109/lpt.2003.809292

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Citations (40)

Silicon Photonic Biosensors Using Label-Free Detection

Enxiao Luan Hossam Shoman Daniel M. Ratner Karen C. Cheung Lukas Chrostowski

Thanks to advanced semiconductor microfabrication technology, chip-scale integration and miniaturization of lab-on-a-chip components, silicon-based optical biosensors have made significant progress for the purpose of point-of-care diagnosis. In this review, we provide an overview of the state-of-the-art in evanescent field biosensing technologies including interferometer, microcavity, photonic crystal, and Bragg grating waveguide-based sensors. Their sensing mechanisms and sensor performances, as well as real biomarkers for label-free detection, are exhibited and compared. We also review the development of chip-level integration for lab-on-a-chip photonic sensing platforms, which consist of the optical sensing device, flow delivery system, optical input and readout equipment. At last, some advanced system-level CMOS-chip packaging examples are presented, indicating the commercialization potential for the low cost, high yield, portable biosensing platform leveraging CMOS processes.

Lab-on-a-Chip

Optofluidics

Waveguide

10.20944/preprints201809.0150.v2

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Citations (43)

Experimental demonstration of subdiffraction light confinement using all-dielectric CMOS-compatible metamaterials

arXiv (Cornell University) (2016)

Amin Khavasi Lukas Chrostowski Zeqin Lu Richard Bojko

A recent computational result suggests that the diffraction limit can be overcome by all-dielectric metamaterials (S. Jahani et. al., Optica 1, 96 (2014)). This substantially decreases crosstalk between dielectric waveguides paving the way for high density photonic circuits. Here, we experimentally demonstrate, on an standard silicon-on-insulator (SOI) platform, that using a simple metamaterial between two silicon strip waveguides results in about 10-fold increase in coupling length. The proposed structure may lead to significant reduction of size of devices in silicon photonics.

Nanophotonics

Crosstalk

Source

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Roadmapping the next generation of silicon photonics

Nature Communications (2024)

Sudip Shekhar Wim Bogaerts Lukas Chrostowski John E. Bowers Michael Hochberg

Abstract Silicon photonics has developed into a mainstream technology driven by advances in optical communications. The current generation has led to a proliferation of integrated photonic devices from thousands to millions-mainly in the form of communication transceivers for data centers. Products in many exciting applications, such as sensing and computing, are around the corner. What will it take to increase the proliferation of silicon photonics from millions to billions of units shipped? What will the next generation of silicon photonics look like? What are the common threads in the integration and fabrication bottlenecks that silicon photonic applications face, and which emerging technologies can solve them? This perspective article is an attempt to answer such questions. We chart the generational trends in silicon photonics technology, drawing parallels from the generational definitions of CMOS technology. We identify the crucial challenges that must be solved to make giant strides in CMOS-foundry-compatible devices, circuits, integration, and packaging. We identify challenges critical to the next generation of systems and applications—in communication, signal processing, and sensing. By identifying and summarizing such challenges and opportunities, we aim to stimulate further research on devices, circuits, and systems for the silicon photonics ecosystem.

Transceiver

10.1038/s41467-024-44750-0

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Citations (133)

Optical Materials And Waveguides

Cambridge University Press eBooks (2015)

Lukas Chrostowski Michael Hochberg

A summary is not available for this content so a preview has been provided. Please use the Get access link above for information on how to access this content.

10.1017/cbo9781316084168.004

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Citations (2)

IEEE Photonics Technology Letters publication information

IEEE Photonics Technology Letters (2014)

S. Bigo Andrew G. Kirk F Koyama Peter M. Smowton J Aitchison

10.1109/lpt.2014.2328778

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Introduction to the OQE special issue on Numerical Simulation of Optoelectronic Devices (NUSOD’11)

Optical and Quantum Electronics (2012)

Wei Lu Aldo Di Carlo Lukas Chrostowski M. F. Pereira S. Sujecki

10.1007/s11082-012-9585-9

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Michelson Interferometer Thermo-Optic Switch on SOI With a 50-µW Power Consumption

IEEE Photonics Technology Letters (2015)

Zeqin Lu K. Murray Hasitha Jayatilleka Lukas Chrostowski

We demonstrate photonic ultra-efficient thermo-optic switches on a 220-nm silicon-on-insulator platform. We used several approaches to increase the tuning efficiency of the switches. We used folded waveguides in a Michelson interferometer configuration to increase the optical interaction length of the light with the heated region, and used a suspended structure to improve thermal isolation. An ultra-low switching power of 50 μW is realized with an extinction ratio of over 26 dB for the transverse electric mode at 1550 nm. The 10%-90% response time of the switch is 1.28 ms, including a 780 μs rise time and a 500 μs fall time. Compared with the best thermo-optic switch in the literature, our device shows approximately an order of magnitude reduction in power consumption.

Extinction ratio

Optical Isolator

Switching time

10.1109/lpt.2015.2462341

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Citations (42)

Multi-Level Encoding and Decoding in a Scalable Photonic Tensor Processor With a Photonic General Matrix Multiply (GeMM) Compiler

IEEE Journal of Selected Topics in Quantum Electronics (2022)

Zhimu Guo Alexander N. Tait Bicky A. Márquez Matthew J. Filipovich Hugh Morison

The resurgence of artificial intelligence enabled by deep learning and high performance computing has seen a dramatic increase of demand in the accuracy of deep learning model which has come at the cost of computational complexity. The fundamental operations in deep learning models are matrix multiplications, and large scale matrix operations and data-centric tasks have experienced bottlenecks from current digital electronic hardware in terms of performance and scalability. Recent research on photonic processors have found solutions to enable applications in machine learning, neuromorphic computing and high performance computing using basic photonic processing elements on integrated silicon photonic platform. However, efficient and scalable photonic computing requires an information encoding/decoding scheme. Here, we propose a multi-level encoding and decoding scheme, and experimentally demonstrate it with a wavelength-multiplexed silicon photonic processor. We also discuss the scalability of our proposed scheme by introducing a photonic general matrix multiply compiler, and consider the effects of speed, bit precision, and noise. Our proposed scheme could be adapted to a variety of photonic information processing architectures for photonic neural networks, photonics tensor cores, and programmable photonic.

10.1109/jstqe.2022.3196884

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Citations (9)

Compact wavelength- and bandwidth-tunable microring modulator

Optics Express (2019)

Hossam Shoman Hasitha Jayatilleka Anthony H. K. Park Ajay Mistry Nicolas A. F. Jaeger

Fabrication errors currently hold back the large-scale adoption of silicon micro-ring modulators (MRMs). The ability to correct their spectral features post-fabrication is required to enable their commercialization. Here, we report and demonstrate an MRM that uses a tunable two-point coupling scheme, which maintains the MRM's compact footprint (60 µm×45 µm) and allows one to tune the MRM's operating wavelength and adjust the optical bandwidth (and/or extinction ratio). This means that one can compensate for fabrication errors and thereby improve the yields. We confirm the modulator's operation by showing NRZ and PAM-4 modulation, up to 28 Gb/s and 19.9 Gb/s, respectively. Also, the proposed tunable MRM maintains the microring's free-spectral range (FSR), which proves its compatibility for configurable and high-bandwidth DWDM applications.

Free spectral range

Extinction ratio

10.1364/oe.27.026661

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Citations (21)