Introduction

Are you passionate about Physics, Nanophotonics, Quantum Materials, and Ultrafast Optics? Freie Universität Berlin is inviting applications for a Research Assistant (Praedoc/PhD) position within the Department of Physics. This exciting opportunity allows aspiring researchers to pursue a PhD while contributing to cutting-edge research funded by the German Research Foundation (DFG) Emmy Noether Programme.

The successful candidate will join the Mueller Research Group, working on the innovative LUNA (Luminescence Upconversion Nanoscopy) project. The research aims to bridge the fields of mid-infrared and visible nanophotonics by developing advanced nonlinear spectro-microscopy techniques and studying light–matter interactions at the nanoscale.

This is an excellent opportunity for graduates seeking an international research career in Germany.

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Overview

The position is offered as a Research Assistant (Praedoc/PhD Student) in the Department of Physics at Freie Universität Berlin. The selected candidate will contribute to building a state-of-the-art nonlinear spectro-microscopy system, investigate light conversion mechanisms in quantum materials, collaborate with international researchers, and publish findings in leading scientific journals.

The appointment is initially funded for two years, with the possibility of a 1.5-year extension based on a successful project evaluation.

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Position Details

• Position: Research Assistant (Praedoc/PhD)
• Job Reference: DM-PHY-759
• University: Freie Universität Berlin
• Department: Physics
• Location: Berlin, Germany
• Employment Type: Research Assistant / PhD Position
• Contract Duration: 2 Years (Extension possible for an additional 1.5 years)
• Working Hours: 75%
• Salary Scale: E13 TV-L FU
• Starting Date: As soon as possible
• Funding: German Research Foundation (DFG) – Emmy Noether Programme

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Research Areas

The successful applicant will work on topics including:

• Nanophotonics
• Nonlinear Optics
• Quantum Materials
• Two-Dimensional (2D) Materials
• Van der Waals Heterostructures
• Semiconductor Nanostructures
• Ultrafast Laser Spectroscopy
• Mid-Infrared and Visible Light Conversion
• Nonlinear Spectro-Microscopy

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Eligibility

Applicants should meet the following requirements:

• Master’s degree in Physics or a closely related discipline (completed before the position starts).
• Research experience in at least one of the following:
  • Nonlinear Optics
  • Nanophotonics
  • 2D Materials
  • Solid-State Physics
• Experience with experimental optical setups is desirable.
• Python programming skills (laboratory automation experience is an advantage).
• Excellent written and spoken English.
• Strong teamwork and communication skills.
• Motivation to conduct innovative scientific research.
• Willingness to relocate if the research group moves to another university during the project.

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Responsibilities

The selected PhD researcher will:

• Assist in building a nonlinear spectro-microscopy system.
• Work with ultrafast laser systems.
• Study doubly resonant luminescence upconversion.
• Investigate quantum materials and semiconductor nanostructures.
• Analyze experimental data.
• Develop optical experiments.
• Collaborate with international research partners.
• Present research at international conferences.
• Publish results in high-impact scientific journals.

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Benefits

Successful applicants will receive:

• Opportunity to pursue a PhD at one of Germany’s leading universities.
• Employment under the German TV-L salary scale (E13).
• Funding through the prestigious DFG Emmy Noether Programme.
• Access to state-of-the-art research laboratories.
• International collaboration opportunities.
• Conference participation and networking.
• Publication opportunities in leading scientific journals.
• Potential contract extension after positive evaluation.
• Excellent academic and career development support.

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Required Documents

Applicants should submit the following as one PDF file:

• Motivation Letter
• Curriculum Vitae (CV)
• Bachelor’s Degree Certificate
• Master’s Degree Certificate
• Academic Transcripts
• Current Master’s Transcript (if the degree has not yet been completed)

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Application Process

Follow these steps to apply:

OFFICIAL LINK

Step 1

Prepare all required application documents.

Step 2

Combine all documents into one PDF file.

Step 3

Submit your application through the official Freie Universität Berlin Career Portal.

Step 4

Applications submitted by email or post will not be accepted.

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Important Dates

• Application Deadline: 21 July 2026
• Starting Date: As soon as possible

Applicants are encouraged to apply early.

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Why Apply?

This PhD opportunity offers numerous advantages:

• Conduct world-class research in Physics and Nanophotonics.
• Work with internationally recognized researchers.
• Access advanced laser and microscopy facilities.
• Participate in international conferences.
• Publish in high-impact journals.
• Build an international academic network.
• Receive competitive funding through the DFG Emmy Noether Programme.
• Launch a successful research career in Europe.

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Tips for a Successful Application

To improve your chances of selection:

• Write a compelling motivation letter tailored to the LUNA project.
• Highlight research experience in optics, nanophotonics, or quantum materials.
• Demonstrate Python programming and laboratory experience.
• Showcase publications or conference presentations, if available.
• Emphasize teamwork and interdisciplinary collaboration.
• Carefully proofread all application documents.
• Submit your application well before the deadline.

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Official Links

Freie Universität Berlin Careers
https://www.fu-berlin.de/en

Mueller Research Group
https://www.physik.fu-berlin.de/en/einrichtungen/ag/ag-mueller/

Contact

Dr. Niclas Mueller

Email: niclas.mueller@fu-berlin.de

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Frequently Asked Questions (FAQs)

Which university is offering this position?

Freie Universität Berlin, Germany.

What is the position?

Research Assistant (Praedoc/PhD Student).

Is this a funded PhD?

Yes. The position is funded through the DFG Emmy Noether Programme.

What degree is required?

A Master’s degree in Physics or a related discipline.

How long is the contract?

Initially two years, with a possible extension of 1.5 years.

What programming language is preferred?

Python.

Is English proficiency required?

Yes. Excellent written and spoken English is required.

How should I apply?

Submit a single PDF containing all required documents through the official online career portal.

Can I apply by email?

No. Applications by email or post will not be considered.

What is the application deadline?

21 July 2026.