Dr. Lukas F. Buchmann received his PhD degree in Physics from the University of Crete in 2010, having spent 3 years in our Group.
He then worked as a postdoctoral researcher at the University of Arizona (USA) and at the University of California, Berkeley (USA).
Between 2015 and 2017 Lukas was a joint research associate at Aarhus University (Denmark) and in our group. After staying
two more years at Aarhus University, Lukas went to Switzerland in 2019, where he is now a Senior Expert in Software and Optical
Measurements at FISBA AG.
Education
- 2010: PhD in Physics, Department of Physics, University of Crete, Greece
- 2007: M.Sc. in Elementary Particle Theory, University of Durham, Durham, England
- 2006: B.Sc. in Physics, University of Zurich, Zurich, Switzerland
Career
- 2015-2019 Research Associate, Aarhus University, Denmark
- 2013-2015 UC Berkeley, Berkeley, CA, Post-Doctoral Researcher
- 2010-2013 Post-Doctoral Researcher, University of Arizona, Tucson, AZ
Interests
- Quantum Technology & Metrology
- Quantum Optics
- Quantum/Classical Transition
- Nonlinear Phenomena
Awards/Prizes/Distinctions
- 2013-2015: SNSF Fellow
Why is it difficult to make small, sub-wavelength in size, lasers? Nowadays we have access to powerful lasers, built to serve many purposes, but what if we wanted to have miniaturized versions of them? To do so we would need to consider materials and techniques other than the traditional; even so, as we start reducing the size of the laser, eventually we will have to encounter a trade-off between the system dimensions and the quality of the laser.
Recently, our group proposed a design that overcomes this apparent dead end [1-3]. The concept is based on using dark resonant states in low-loss dielectrics as an equivalent of the laser cavity, that is, a dark state essentially replaces the mirrors used in big lasers. This is possible because dark states are localized, resonant electromagnetic modes that do not radiate. Therefore they are used to separate the gain-coupled resonant photonic state responsible for macroscopic stimulated emission from the coupling to free-space propagating modes, allowing independent adjustment of the lasing state and its coherent radiation output.
In this talk, I will give a detailed discussion of the key-functionalities and benefits of this design, such as radiation tunability, directionality, sub-wavelength integration, and simple layer-by-layer fabrication.
References
[1] Droulias, S., Jain, A., Koschny, T. & Soukoulis, C. M. Novel lasers based on resonant dark states. Phys. Rev. Lett. 118, 073901 (2017).
[2] Droulias, S., Jain, A., Koschny, T. & Soukoulis, C. M. Fundamentals of metasurface lasers based on resonant dark states. Phys. Rev. B 96, 155143 (2017).
[3] Droulias, S., Koschny, T. & Soukoulis, C. M. Finite-Size effects in metasurface lasers based on resonant dark states. ACS Photonics 5(9), 3788 (2018).
M.Sc. dissertation carried out at IESL-FORTH, entitled "Light-induced Switching of Magnetic Materials with Ultrashort Laser Pulses" (2007); degree awarded by the University of Crete (Dept. of Physics).
Education
- 2007, M.Sc. Microelectronics-Optoelectronics, Physics Dept.; University of Crete, Greece
- 2005, B.Sc. Materials Science & Engineering; University of Crete, Greece
Interests
- physics of magnetic dynamics
- optical pump-probe methods with femtosecond laser sources
- nanoscale materials for novel magneto-optic devices
Awards/Prizes/Distinctions
- 2001, Prize for excellence, State Scholarships Foundation – IKY, Greece; Admitted 1st (Panhellenic exams), Materials Science & Engineering Dept., University of Crete
M.Eng. dissertation carried out at IESL-FORTH, entitled "System Automation for Multi-spectral and Time-resolved Imaging Studies of Phase Transitions in Magneto-dielectric Materials" (2017); degree awarded by the Technological Educational Institute of Crete (School of Engineering – Dept. of Electrical Engineering).
Education
- 2017, M.Eng. in Advanced Systems of Production, Automation and Robotics; Technological Educational Institute of Crete, Greece
- 2013, B.Eng. Electrical Engineering; Technological Educational Institute of Crete, Greece
Interests
- development of diagnostic tools for physical property measurements in condensed matter
- numerical computing algoriths for itiretative data analysis
- creating user interfaces and interfacing experimental stations and instruments with programs
Education
- 2007, M.Sc. Finance; University of Liverpool, UK
- 2004, Ph.D. Physics; Vienna University of Technology, Austria
- 2001, M.Sc. Enngineering Physics; Budapest University of Technology and Economics, Hungary
Interests
- Magnetic oxides and noble metal nanocomposites
- Electronic structure modulations at interfaces
- Tunneling spectroscopy simulations
- Ab initio theoretical studies of hybvrid nanomaterials
Awards/Prizes/Distinctions
- 2006, University of Liverpool Alumni Scholarship, UK
- 2004, EU Descartes Research Prize finalist with the research group at CMS, Vienna, Austria
- 2001, Joint scholarship of Budapest University of Technology and Economics & Vienna University of Technology
Education
- 2006, Ph.D. Physics; Institute of Physics, Chinese Academy of Sciences, Beijing, China.
- 2003, M.Sc. Materials Science; Northeastern University, Shenyang, China.
- 1999, B.Sc. Materials Science; Lanzhou University of Technology, Lanzhou, China.
Interests
- Transport from single functional organic molecules or nanocrystals
- Synthesis and characterization of nanostructured semiconductor materials
- Micro/nano fabrication technologies
- Colossal magnetoresistance (CMR) materials
Education
- 2004, Ph.D. Chemistry; University of Brest, France.
- 1999, M.Sc. Chemistry; University of Brest, France.
- 1998, B.Sc. Chemistry; University of Brest, France.
Interests
- New molecular materials with magnetic and/or conducting properties
- Wet chemistry pathways for shape controlled nanoparticles
- Lattice mis-matched hybrid nanocrystals
- Nanomaterials for biological labelling or magneto-optical recording
