Overview
PhD Project: Micro-Optics and Packaging for Co-Packaged Optics on Electro-Optic Glass Interposers. This PhD project will develop advanced optical and electrical packaging solutions to enable next-generation Co-Packaged Optics (CPO) systems. CPO is a leading architecture for data centre and AI accelerator interconnects, enabling tightly integrated optical and electronic functions to achieve higher bandwidth, lower latency, and improved energy efficiency.
The project will focus on designing and optimising micro-optical components to couple light into and out of electro-optic glass interposers with minimal insertion loss, targeting coupling efficiencies better than 1 dB and optical path lengths below one millimetre. The student will use simulation tools such as Lumerical, Zemax, or COMSOL to design compact lens, grating, or mirror structures, evaluate their tolerance to misalignment, and optimise them for manufacturability at wafer scale.
The project also addresses packaging challenges associated with co-integrating photonic and electronic chiplets on advanced glass interposers. Activities include waveguide pitch reduction (10–15 µm) to increase optical channel density, precision alignment and bonding strategies, underfill and encapsulation methods, and ensuring electrical performance to support broadband RF interconnects up to 70 GHz without compromising optical alignment or signal integrity. Demonstrator modules combining multiple optical channels with high-speed electronic interfaces will be fabricated and characterised at Tyndall.
Access to Tyndall’s cleanroom and packaging laboratories will be available for microfabrication or assembly activities, with the option to tailor experimental work to the student’s skills and project direction. The outcomes will contribute to scalable, energy-efficient optical interconnects for future data centres and AI computing platforms.
The successful candidate will receive training in all required research methods, including packaging processes, simulation suites, and reliability facilities. Opportunities exist to present at national and international conferences and publish in high-impact journals.
Key Responsibilities
* Explore waveguide pitch reduction in the 10–15 µm range to increase optical channel density
* Develop precision alignment and bonding strategies
* Investigate underfill and encapsulation methods that maintain optical performance while providing mechanical stability and thermal management
* Collaborate with internal and external researchers
* Successfully complete the minimum required taught modules in technical subjects and transferable and generic skills
* Disseminate research findings through peer-reviewed publications and conference presentations
* Regularly participate in public engagement and outreach activities
* Ensure all activities are compliant with the Tyndall Quality Management system
* Ensure all activities are compliant with the required Health and Safety standards
* Carry out any additional duties as may be reasonably required within the general scope and level of the post
Essential Criteria
* A First-Class Honors Degree (2:1 or higher) in Physics, Engineering, Materials Science, Chemistry, or a related discipline
* Demonstrated ability to work independently and as part of a team
* Highly self-motivated with initiative and a desire to learn
* Good scientific writing and communication skills
Desirable Criteria
* Prior experience with semiconductor packaging in industrial or research settings
* Hands-on experience with reliability and characterisation tools
What We Offer
A fully funded PhD position that includes a stipend of €25,000/year for up to four years and full coverage of academic fees. The successful candidate will be registered as a PhD student at University College Cork. Doctoral students will gain advanced research skills for photonic technologies and the leadership and teamwork capabilities needed in industry. Starting date is available immediately upon academic approval from UCC.
Application Instructions
Please attach an up-to-date CV/Resume and a brief cover letter outlining how you meet the criteria for this role. Postgraduate applicants whose first language is not English must provide evidence of English language proficiency as per UCC regulations. Certificates should be valid (usually less than 2 years old) and uploaded with the application. Garda vetting or international police clearance may form part of the selection process. Tyndall National Institute is an Equal Opportunities Employer.
Closing date
Closing date for application is 17 October 2025.
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