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Imec and Ghent University Demonstrate First Laser Arrays Monolithically Grown on 300mm Silicon Wafers - Breakthrough Marks Significant Step Towards Next-Generation Photonic Integrated Circuit Technology Targeting Advanced Optical Interconnects; Findings Published in Nature Photonics - UGent.be / imec.be
Imec and Ghent University Demonstrate First Laser Arrays Monolithically Grown on 300mm Silicon Wafers

 

PRZOOM - /newswire/ - Leuven, Belgium, 2015/10/29 - Breakthrough Marks Significant Step Towards Next-Generation Photonic Integrated Circuit Technology Targeting Advanced Optical Interconnects; Findings Published in Nature Photonics - UGent.be / imec.be.

   
 
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Imec and Ghent University present, for the first time, arrays of indium phosphide lasers monolithically integrated on 300mm silicon substrates in a CMOS pilot line. This breakthrough achievement, published in Nature Photonics, provides a path toward high-volume manufacturing of cost-effective photonic integrated circuits (PICs) with monolithically integrated laser sources. Such laser-powered PICs will revolutionize data transfer between future logic and memory chips.

Over the past few years, demand for data communication between servers in cloud datacenters has been growing exponentially, following strong growth in social networking, cloud computing and big data applications. Silicon photonics technology enables cost-effective manufacturing of fiber-optic transceivers, which in turn provides continued scaling of server and datacenter capacity with improved power efficiencies. However, wide-spread adoption of this technology has been hampered in part by the lack of monolithically integrated laser sources. The integration on silicon of efficient indium phosphide based light sources, currently driving long-range telecommunication networks, is known to be very challenging, owing to the large mismatch in crystal lattice constants between both materials.

Imec and Ghent University overcame these structural differences and largely suppressed the detrimental crystal defects that typically form at the interface between silicon and indium phosphide. Utilizing a production grade metal-organic vapor-phase epitaxial (MOVPE) growth reactor, indium phosphide semiconductor was selectively grown on silicon in a pre-patterned oxide template, realizing indium phosphide waveguide arrays across the entire 300mm substrate. Subsequently, periodic grating structures were etched in the top layer of these waveguides, providing the optical feedback required for laser operation.

Lasing operation was demonstrated for all tested devices consisting of an array of ten indium phosphide lasers. Typical lasing threshold powers of around 20mW were observed at room temperature under optical pumping. Lasing performance showed small variability along the array, illustrating the high material quality of the heteroepitaxial grown indium phosphide. In addition, accurate control on the distribution of lasing wavelengths in the array was demonstrated by modifying the grating parameters.

The newly demonstrated approach for integrating lasers with silicon has been carried out in imec’s 300mm CMOS pilot line facility, therefore providing a path to large volume manufacturing. Ongoing research efforts focus on growing more complex layer stacks to enable electrical injection of the lasers and emission in the 1300nm wavelength range, along with integration with silicon based waveguide devices.

This work has been carried out as part of imec’s industry affiliation program on Optical I/O, which targets the development of a scalable, silicon-based optical interconnect technology for high-bandwidth chip-level I/O. The work was also partly supported by the European Commission through an ERC starting grant awarded to Prof. D. Van Thourhout of Ghent University for research on Ultra Low Power Photonic ICs (ULPPIC). This five year project aims to develop novel active photonic devices with lower power consumption, for integration on next generation electronic and photonic ICs.

Imec’s research and development work on Optical I/O is performed in cooperation with key partners in its core CMOS programs including Huawei, GlobalFoundries, Intel, Micron, Panasonic, Qualcomm, Samsung, SK Hynix, Sony and TSMC.

About imec
Imec performs world-leading research in nanoelectronics. Imec leverages its scientific knowledge with the innovative power of its global partnerships in ICT, healthcare and energy. Imec delivers industry-relevant technology solutions. In a unique high-tech environment, its international top talent is committed to providing the building blocks for a better life in a sustainable society. Imec is headquartered in Leuven, Belgium, and has offices in Belgium, the Netherlands, Taiwan, USA, China, India and Japan. Its staff of about 2,200 people includes almost 700 industrial residents and guest researchers. In 2014, imec's revenue (P&L) totaled 363 million euro. Further information on imec can be found at imec.be. Stay up to date about what’s happening at imec with the monthly imec magazine, available for tablets and smartphones (as an app for iOS and Android), or via the website.

Imec (imec.be) is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.)and imec China (IMEC Microelectronics (Shanghai) Co. Ltd.) and imec India (Imec India Private Limited).

About Ghent University (UGent)
Ghent University (UGent.be) consists of 117 departments across 11 faculties and offers high-quality research-based educational programs in virtually every scientific discipline. UGent distinguishes itself as a socially committed and pluralistic university in a broad international perspective. The motto of the university is ‘Dare to Think’. The university’s appeal is growing every year, with about 41,000 students in 2014, of whom 11% (students) and 35% (PhD students) are international. Numerous research groups, centres and institutes have been founded over the years, becoming world-renowned in disciplines such as biotechnology, aquaculture and micro-electronics.
Contact: T: +32 9 331 01 01 - E: GUIDe[.]UGent.be

About the Photonics Research Group
The Photonics Research Group in the Department of Information Technology of Ghent University is active in the field of photonic integration - more specifically silicon photonics - and its applications in information and communication technology, in sensing and in life sciences. The group puts its research focus on new concepts for photonic integrated devices and circuits and on the associated technologies and design methodologies. This includes passive and active waveguide-based photonic components, based on CMOS-compatible materials and processes as well as hybrid approaches combining silicon with other functional materials.

 
 
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Imec and Ghent University Demonstrate First Laser Arrays Monolithically Grown on 300mm Silicon Wafers

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300mm Silicon Wafers | Ghent University
Contact: Hanne Degans - imec.be 
+32 16 28 17 69 / +32 486 06 51 75 (mobile) hanne.degans[.]imec.be
 
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IMPORTANT INFORMATION: Issuance, publication or distribution of this press release in certain jurisdictions could be subject to restrictions. The recipient of this press release is responsible for using this press release and the information herein in accordance with the applicable rules and regulations in the particular jurisdiction. This press release does not constitute an offer or an offering to acquire or subscribe for any Imec securities in any jurisdiction including any other companies listed or named in this release.

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