The Terahertz Devices and Systems Laboratory at the Department of Electrical Engineering and Information Technology, TU Darmstadt, offers a position as

Research Assistant (PhD position) (all genders)

initially for a limited period of 32 months with a start as soon as possible as part of the project "Additively manufactured multi-spectral NIR-THz sensor systems (AMUSE)", which is funded by the German Research Foundation.

The project partner is the Technical University of Ostwestfalen-Lippe. The subject of the research activities is the development of additively manufactured sensor elements, which are read both at a wavelength around 1550nm and in the terahertz frequency range (100 GHz-10 THz). The terahertz devices will be photomixers, which will be illuminated with two continuous-wave lasers that are detuned by the desired terahertz frequency. The device then generates a terahertz alternating current, which is emitted via an on-chip antenna. In the case of photoconductors, specifically ErAs:In(Al)GaAs photoconductors, the scheme can be inverted to detect terahertz waves, i.e. in addition to the optical signal, a terahertz signal is coupled by means of an antenna attached to the photoconductor, biasing the photoconductor with an alternating voltage in the THz range. This results in mixing of the optical and THz signals, resulting in a low-frequency/DC component proportional to the THz field strength. At least one of the two lasers for photomixing is used in parallel for the optical part of the sensor. One focus of the activities will be the design of waveguide structures for the sensor element, coupling and decoupling structures, and the actual sensor element. Semiconductor components are processed in the clean room of the institute. Dielectric structures additively manufactured by the project partner. Other activities include characterization of the structures, devices and the entire sensor in the laboratory. The results shall be published at conferences and in journal articles. The work is carried out in a team with another doctoral student of the TH Ostwestfalen-Lippe in a friendly, international research atmosphere.

The applicant shall fulfill the following requirements:

  • An excellent degree in one of the following subjects is a prerequisite: Physics or Electrical Engineering
  • The first master or diploma degree shall not be older than four years

The applicant shall have knowledge/experience in at least one of the following topics:

  • Waveguide structures
  • Experience with lasers and fiber optics
  • Terahertz
  • Clean room experience

We expect excellent, independent research and support explicitly publications in peer-reviewed scientific journals and at renowned national and international conferences, as well as collaboration with other research groups. Further information is available under:

Opportunity for further qualification (doctoral dissertation) is given. The fulfillment of the duties likewise enables the scientific qualifications of the candidate.

The Technische Universität Darmstadt intends to increase the number of female employees and encourages female candidates to apply. In case of equal qualifications applicants with a degree of disability of at least 50 or equal will be given preference. Wages and salaries are according to the collective agreements on salary scales, which apply to the Technische Universität Darmstadt (TV-TU Darmstadt). Part-time employment is generally possible.

Your application should include: your curriculum vitae; MSc/Diploma certificates and grades; a letter of motivation stating your interest in the position and topic; An optional reference letter from the Master thesis supervisor will be helpful.
Please send your electronic application to Prof. Sascha Preu ( under the Code-No. with the subject “PhD AMUSE”.

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Code No. 664

Published on

March 06, 2023

Application deadline

March 31, 2023