Please note that the Division has become a small emeritus group at the end of March 2021, following the statutory retirement of Philip Russell. As a result the group is no longer recruiting PhD students, but can still offer Masters projects. Enquiries about postdoctoral positions are also welcome, although the opportunities are limited. In either case, please send an email, with your curriculum vitae and a statement of your research interests, to Bettina Schwender at Bettina.Schwender@mpl.mpg.de.
The Division of Photonic Crystal Fibre Science is part of the Max-Planck Institute for the Science of Light, founded in January 2009. It was formerly part of a Max Planck Research Group at the Friedrich-Alexander-University of Erlangen-Nuremberg. The Division has over 40 members (laboratory assistants, masters and doctorate students, post-doctoral researchers and visitors) from all over the world. There is a strongly international atmosphere, and as a result the working language is English (though many of us speak German).
For all general inquiries, please contact Bettina Schwender at:
Russell Emeritus Group
Max Planck Institute for the Science of Light
D-91058 Erlangen, Germany
The Max Planck Institute is located right next to the Science Campus of the Friedrich-Alexander-University Erlangen-Nuremberg, on its northern edge. See the information page on how to find us.
The Division works on scientific applications of photonic crystal and microstructured fibres. Photonic crystal fibre was first proposed by Philip Russell in 1991, and his group reported the first example of a working PCF in 1996. Since that time many groups all over the world have become active in developing PCF and exploiting its many applications. In the division we are carrying out a wide range of experiments that make use of the remarkable properties of PCFs. These include ultrafast nonlinear dynamics in gas-filled hollow-core PCF, optomechanical effects in nano-scale glass structures, orbital angular momentum in twisted PCF and laser propulsion and manipulation of particles in hollow-core PCF.
Dr Girish Kulkarni, Group of Prof. Robert Boyd, Department of Physics, University of Ottawa, Canada
Leuchs-Russell Auditorium, A.1.500, Staudtstr. 2…
A step forward in modern quantum technology: frequency conversion of single photons at arbitrary wavelengths
Quanta of light - photons - form the basis of quantum key distribution in modern cryptographic networks. Before the huge potential of quantum…
Prof Fan Yang, European Molecular Biology Laboratory, Heidelberg, Germany
Leuchs-Russell Auditorium, A.1.500, Staudtstr. 2
Fibres made of special glass and filled with a defined pattern of microscopic hollow channels are helping to better understand the sometimes strange…
Efficient monitoring of airborne particulate matter (PM), especially particles with aerodynamic diameter less than 2.5 μm (PM2.5), is crucial for…
Synchronization of gigahertz core resonances in multiple photonic crystal fiber cores by timing-modulated harmonic mode locking
Dung-Han Yeh, Wenbin He, Meng Pang, Xin Jiang, Philip St.J. Russell
Optica 8(12) 1581-1585 (2021) | Journal
Synchronization of mechanical oscillators by optical forces is a topic that has been much explored in recent years, for example, in the context of SiN microdisk resonators. Here we report stable long-term synchronization of the core vibrations of three different photonic crystal fibers, driven intra-cavity by a 2 GHz train of timing-modulated pulses in a high harmonic opto-acoustically mode-locked fiber laser. The core resonances are equally spaced in frequency and are coupled purely by the optical field. Under the correct conditions, they become stably synchronized, being simultaneously driven by the timing-modulated pulse train. Floquet–Bloch theory, in which the pulses are treated as particles trapped in potential wells and coupled by optomechanical back-action, describes the complex temporal dynamics observed in the experiments. This unique system provides a novel means of modifying the temporal structure of pulse trains running at few-gigahertz repetition rates.
Optical signatures of the coupled spin-mechanics of a levitated magnetic microparticle
Vanessa Wachter, Victor A. S. V. Bittencourt, Shangran Xie, Sanchar Sharma, Nicolas Joly, Philip Russell, Florian Marquardt, Silvia Viola-Kusminskiy
We propose a platform that combines the fields of cavity optomagnonics and levitated optome- chanics in order to control and probe the coupled spin-mechanics of magnetic dielectric particles. We theoretically study the dynamics of a levitated Faraday-active dielectric microsphere serving as an optomagnonic cavity, placed in an external magnetic field and driven by an external laser. We find that the optically driven magnetization dynamics induces angular oscillations of the particle with low associated damping. Further, we show that the magnetization and angular motion dynamics can be probed via the power spectrum of the outgoing light. Namely, the characteristic frequencies attributed to the angular oscillations and the spin dynamics are imprinted in the light spectrum by two main resonance peaks. Additionally, we demonstrate that a ferromagnetic resonance setup with an oscillatory perpendicular magnetic field can enhance the resonance peak corresponding to the spin oscillations and induce fast rotations of the particle around its anisotropy axis.
Specialty Photonic Crystal Fibers and Their Applications
David Novoa, Nicolas Joly
This year not only commemorates the 60th anniversary of nonlinear optics with the seminal experiment of second harmonic generation, but it is also the 30th anniversary of the invention of the photonic crystal fiber (PCF). Following their first practical demonstration in 1996, PCFs have rapidly evolved into an established platform for applications in both academic and industrial environments. Their unique ability to confine light in a far more versatile way than possible with conventional optical fibers facilitated the expansion of the multifaceted world of PCF to cover not only nonlinear optics, but also many other disparate fields such as interferometry, beam delivery, laser science, telecommunications, quantum optics, sensing, microscopy, and many others.