Postdoctoral Opportunity in Rare-Earth Ion Optomechanics for Quantum Networks at TU Delft

The Groeblacher Lab at Delft University of Technology (TU Delft) invites applications for a highly competitive and fully funded postdoctoral research position in Rare-Earth Ion Optomechanics, focused on developing critical components for the quantum internet. The candidate will contribute to the realization of scalable, integrated quantum networks by working with erbium ion-based quantum emitters embedded in silicon photonic structures.

This role is situated at the intersection of quantum optics, solid-state physics, and nanotechnology, offering researchers the opportunity to engage in world-class quantum information science.

Research Focus: Enabling Quantum Internet through Rare-Earth Ions

The core objective of this postdoctoral position is to explore whether silicon microchips, which are foundational to classical electronics, can be effectively used to build the architecture of the next-generation quantum internet.

By embedding erbium ions—known for their coherent optical transitions in the telecom C-band—within a silicon host matrix and enhancing emission through photonic crystal cavities, the lab aims to build high-coherence, single-photon sources compatible with existing optical fiber networks.

In parallel, leveraging isotopically pure silicon offers the potential to realize programmable quantum registers with long coherence times, forming the backbone of integrated, scalable quantum communication devices.

Key Responsibilities

• Conduct experimental research on single rare-earth ion emitters in solid-state environments.

• Integrate erbium ions into silicon photonic crystal cavities and characterize their emission properties.

• Collaborate with a multidisciplinary team of scientists and engineers across quantum optics, nanofabrication, and quantum information theory.

• Supervise and mentor PhD students within the group.

• Contribute to the development of scalable platforms for quantum network nodes.

Required Qualifications

• A PhD in Applied Physics, Quantum Optics, Engineering Physics, or related fields.

• Demonstrated expertise in rare-earth ion systems, single-emitter spectroscopy, or atomic, molecular, and optical (AMO) physics.

• In-depth theoretical understanding of solid-state quantum emitters, quantum optics, and light–matter interactions.

• Strong publication record in peer-reviewed journals.

• Experience in nanofabrication and cryogenic systems is highly desirable.

Institutional Environment

TU Delft is globally recognized for its excellence in science and engineering. Its Department of Quantum Nanoscience hosts an international hub of interdisciplinary research, encompassing quantum theory, quantum materials, and quantum devices. Researchers benefit from cutting-edge infrastructure, including extensive cleanroom nanofabrication facilities and cryogenic measurement systems.

The Groeblacher Lab, part of the department, is a dynamic, inclusive research group pioneering new technologies in quantum optomechanics and hybrid quantum systems. The lab strongly supports equity, inclusion, and diversity as essential pillars for scientific innovation.

For more details: http://groeblacherlab.tudelft.nl

Compensation and Benefits

• Contract Duration: 2 years

• Work Hours: Full-time (38 hours/week)

• Salary and Benefits: In accordance with the Collective Labour Agreement for Dutch Universities (CAO-NU)

• Relocation Support: TU Delft provides personalized relocation assistance and a Dual Career Programme to help partners integrate into the Dutch job market.

• Flexible Scheduling: Work-life balance is supported through adaptable work arrangements.

Application Process

Deadline to Apply: 23 May 2025
Apply via: [TU Delft Online Application Portal]
Documents Required:

• Curriculum Vitae (CV)

• Motivational Letter

Contact Person:
Prof. Dr. Simon Groeblacher
Email: [email protected]

Please note: that applications sent by email will not be processed. A pre-employment screening and a knowledge security check, as outlined in the Dutch National Knowledge Security Guidelines (Chapter 8), may be part of the selection procedure.