The Fraunhofer-Gesellschaft ) currently operates 76 institutes and research units throughout Germany and is a leading applied research organization. Around employees work with an annual research budget of 3.4 billion euros.Our »Optical Quantum Metrology« research group develops innovative measurement technology for clinical and industrial applications based on the ability to measure the oscillations of electric fields in the infrared and terahertz spectral range in a stroboscopic manner.As part of the LightwaveLab, the research group offers the fascinating opportunity to fundamentally examine light at the quantum limit on the one hand, and to apply it as a spectroscopic tool for human medicine, biology and industrial material characterisation on the other.The advertised PhD program aims to develop novel photonic measurement techniques based on interferometry and nonlinear optics that enable spectroscopic measurement of the entire physiologically-relevant concentration range of molecules in biological fluids and gases.Achieving these ambitious goals requires substantial further development of key femtosecond technologies, which will be realised through cooperation with the Max Planck Institute for Quantum Optics as part of a renowned Max-Planck-Fraunhofer project.Selection of relevant publications:(1) I. Pupeza, et al., "Field-resolved infrared spectroscopy of biological systems", Nature (2) I. Pupeza, et al., "Extreme-ultraviolet frequency combs for precision metrology and attosecond science", Nature Photonics (2021)(3) P. Sulzer, …, I. Pupeza, "Cavity-enhanced field-resolved spectroscopy", Nature Photonics (2022)(4) M. Peschel, …, I. Pupeza, "Sub-optical-cycle light-matter energy transfer in molecular vibrational spectroscopy", Nature Photonics (2022)What you will doParticipation in a renowned Max-Planck-Fraunhofer cooperation projectSupport in setting up an ultra-stable, compact laser system for generating ultra-short and ultra-broadband laser pulses for stroboscopic examinationSetup of a novel, enhancement-cavity based field-resolving spectrometer for the analysis of medically relevant gasesWhat you bring to the tableMaster's degree in experimental physics or similar, preferably with a specialisation in photonics, laser physics, and nonlinear opticsIndependence, a high degree of personal responsibility and motivationExperience with optical laser setupsGood English skillsWhat you can expectExciting tasks in a dedicated, international team of scientistsUnique opportunity to work at the forefront of medically relevant science and applicationClose mentoring with university supervisionOpportunity for further education and trainingProspect of authorship in high-impact publicationsClose cooperation with the Max Planck Institute for Quantum Optics in GarchingThe doctorate is awarded as part of an ITWM scholarship.