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BC-54 PhD - Widely Tuneable Lasers Integrated on Silicon Photonics Platforms

BC-54 PhD – Widely tuneable lasers integrated on silicon photonics platforms

Contract Type - Full time – 4 years

Tyndall National Institute at University College, Cork seeks a PhD student to design and build and demonstrate a widely tunable laser in the near-infra-red part of the spectrum.

Tunable lasers are one of the most important photonic devices permitting full exploitation of the wavelength domain in applications from communications to sensing. Despite this importance, the performance of semiconductor tunable lasers is modest. The wavelength tuning span is typically 50-60nm with hero devices reaching 100nm. The devices with high tuning speed are compromised by a complex parameter space for tuning while continuously tunable devices are based on expensive external cavity configurations. The reason for this limitation is that constructing tunable lasers on III-V materials is very challenging due to the multiple epitaxial overgrowth stages needed to separate the gain-providing and tunable-filtering sections of the device. This issue can be addressed by integrating gain providing semiconductors on silicon photonics platforms where the separation between active and passive parts of the device can be achieved while simultaneously integrating photonic elements. It should allow a single growth step can be used for the amplifier sections and by combining multiple gain blocks from different wafers an extended tuning range can be accessed. Transfer printing is the way we will achieve this heterogeneous integration as it allows precise placement of the essential material from a source wafer to a target wafer.


The candidate is to develop the laser design (simulation), realisation of the device (growth, fabrication) and its evaluation supported by the wide expertise and excellent infrastructure at Tyndall. The student will use scientific methods to innovate with new concepts. The student should be self-motivated and be ready to present their work in conferences and publications. The work must be performed in a safe manner.

Essential Criteria

  • The successful candidate must have first class honours degree or have a MSc. in physics (photonics), electrical engineering, material science or a related field.
  • The candidate must demonstrate their motivation, initiative, teamwork, excellent writing and communication skills.

Desirable Criteria

  • Relevant experience in the design of devices/circuits or in the fabrication of semiconductor device is an advantage.

For further queries please contact Mr. Brian Corbett at (email address)

An annual student stipend of €18,000.00 applies for this successful candidate for this position.  Yearly University academic fees will paid by the Tyndall National Institute.

Application Instructions

Step 1 - please click here to download the application form

Step 2 -  return the completed application form, together with your cv, motivation letter and references to  Handwritten forms will not be accepted.

Please note that Garda vetting and/or an international police clearance check may form part of the selection process.

The University, at its discretion, may undertake to make an additional appointment(s) from this competition following the conclusion of the process.

At this time, Tyndall National Institute does not require the assistance of recruitment agencies.

Tyndall National Institute at University College, Cork is an Equal Opportunities Employer.