Raja Arslan S., Voloshin Andrey S., Guo Hairun, Agafonova Sofya E., Liu Junqiu, Gorodnitskiy Alexander S., Karpov Maxim, Pavlov Nikolay G., Lucas Erwan, Galiev Ramzil R., Shitikov Artem E., Jost John D., Gorodetsky Michael L., Kippenberg Tobias J. (2019), Electrically pumped photonic integrated soliton microcomb, in Nature Communications
, 10(1), 680-680.
Huang Guanhao, Lucas Erwan, Liu Junqiu, Raja Arslan S., Lihachev Grigory, Gorodetsky Michael L., Engelsen Nils J., Kippenberg Tobias J. (2019), Thermorefractive noise in silicon-nitride microresonators, in Physical Review A
, 99(6), 061801-061801.
Weng Wenle, Lucas Erwan, Lihachev Grigory, Lobanov Valery E., Guo Hairun, Gorodetsky Michael L., Kippenberg Tobias J. (2019), Spectral Purification of Microwave Signals with Disciplined Dissipative Kerr Solitons, in Physical Review Letters
, 122(1), 013902-013902.
Lugiato L. A., Prati F., Gorodetsky M. L., Kippenberg T. J. (2018), From the Lugiato–Lefever equation to microresonator-based soliton Kerr frequency combs, in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
, 376(2135), 20180113-20180113.
Lucas E., Lihachev G., Bouchand R., Pavlov N. G., Raja A. S., Karpov M., Gorodetsky M. L., Kippenberg T. J. (2018), Spatial multiplexing of soliton microcombs, in Nature Photonics
, 12(11), 699-705.
Kippenberg Tobias J., Gaeta Alexander L., Lipson Michal, Gorodetsky Michael L. (2018), Dissipative Kerr solitons in optical microresonators, in Science
, 361(6402), eaan8083-eaan8083.
Guo Hairun, Herkommer Clemens, Billat Adrien, Grassani Davide, Zhang Chuankun, Pfeiffer Martin H. P., Weng Wenle, Brès Camille-Sophie, Kippenberg Tobias J. (2018), Mid-infrared frequency comb via coherent dispersive wave generation in silicon nitride nanophotonic waveguides, in Nature Photonics
, 12(6), 330-335.
Anderson M., Pavlov N. G., Jost J. D., Lihachev G., Liu J., Morais T., Zervas M., Gorodetsky M. L., Kippenberg T. J. (2018), Highly efficient coupling of crystalline microresonators to integrated photonic waveguides, in Optics Letters
, 43(9), 2106-2106.
Lucas E., Karpov M., Guo H., Gorodetsky M. L., Kippenberg T. J. (2017), Breathing dissipative solitons in optical microresonators, in Nature Communications
, 8(1), 736-736.
Lobanov Valery E., Cherenkov Artem V., Shitikov Artem E., Bilenko Igor A., Gorodetsky Michael L. (2017), Dynamics of platicons due to third-order dispersion, in The European Physical Journal D
, 71(7), 185-185.
Pavlov N G, Lihachev G, Koptyaev S, Lucas E, Karpov M, Kondratiev N M, Bilenko I A, Kippenberg T J, Gorodetsky M L (2017), Soliton dual frequency combs in crystalline microresonators, in Optics letters
, (3), 514-517.
Guo H., Karpov M., Lucas E., Kordts A., Pfeiffer M. H. P., Brasch V., Lihachev G., Lobanov V. E., Gorodetsky M. L., Kippenberg T. J. (2017), Universal dynamics and deterministic switching of dissipative Kerr solitons in optical microresonators, in NATURE PHYSICS
, (1), 94-102.
Guo H., Karpov M., Lucas E., Kordts A., Pfeiffer M. H. P., Brasch V., Lihachev G., Lobanov V. E., Gorodetsky M. L., Kippenberg T. J. (2017), Universal dynamics and deterministic switching of dissipative Kerr solitons in optical microresonators, in Nature Physics
, 13(1), 94-102.
Lecaplain C., Javerzac-Galy C., Gorodetsky M. L., Kippenberg T. J. (2016), Mid-infrared ultra-high-Q resonators based on fluoride crystalline materials, in Nature Communications
Lobanov V. E., Lihachev G. V., Pavlov N. G., Cherenkov A. V., Kippenberg T. J., Gorodetsky M. L. (2016), Harmonization of chaos into a soliton in Kerr frequency combs, in Optics Express
, (24), 27382-27382.
The development of femtosecond optical frequency combs has had a tremendous impact on science and technology since their initial development in 2000. Aside from the well-known applications in precision frequency metrology(11, 12) and highly multiplexed spectroscopy, the ability to manipulate the amplitude and phase of precisely-defined spectral components has also opened up entirely new approaches in spectroscopy, Raman spectrometry, LIDAR, low noise microwave generation, time transfer or photonic signal processing.Discovered by the Kippenberg Laboratory in 2007, micro-resonator optical frequency comb have triggered a second revolution in metrology, by enabling a dramatic miniaturization of frequency combs, enabling chipscale integration that is now being investigated by dozens of labs in particular the US. The ability to synthesize frequency combs directly on chip, provides a path to fully integrated optical combs that can make frequency measurements, frequency synthesis and comb sources ubiquitous and finally enter mainstream applications markets. Key advantages of microresonator frequency combs are their compact form factor, high power per comb line, and their ability to access repetition rates of 10-100 GHz, relevant for many application including high capacity telecommunications or microwave photonics. In addition the gain bandwidth is only limited by the transparency window, opening the ability to generate combs in the UV or mid IR spectral range.Over the past years there has been rapid and substantial progress in microresonator based frequency combs. Combs have been demonstrated in a variety of platforms, including crystalline resonators, silica toroid resonators, SiN microresonators on a silicon chip, or Hydex planar lightwave circuits. Moroever, microresonator combs have been used in proof of concept applications, including the demonstration of an optical atomic clock, optical waveform synthesis, as well as the demonstration of counting of the cycles of light as well as coherent communication with terabit per second using Kerr combs. In addition an understanding of the rich nonlinear dynamics has been obtained and low noise states been identified. The applicant has within this field made several contributions, several of which have been jointly with the group of Professor Gorodetsky in Moscow. The strong theoretical contributions from Prof. Gorodetsky and the advanced experimental capabilities and expertise in metrology of the Kippenberg Laboratory have led to several widely recognized advances in the field of microresonator combs (and cavity optomechanics, not mentioned here). This includes the first measurement of microresonator dispersion (Nature Photonics 2010), the first demonstration of the universal noise properties of Kerr combs (Nature Photonics 2012), the first octave spanning Kerr combs (Phys. Rev. Lett. 2010), the first demonstration of temporal solitons (Nature Photonics 2014) and an understanding of soliton dynamics in micro-resonators (Phys. Rev. Lett 2015). In particular, over the last two years the applicants at EPFL and MSU have discovered a new method to generate optical combs in a micro-resonator based on temporal solitons in optical micro-resonators. This result, is a decisive breakthrough in the field as it allows to generate optical combs that are coherent, broadband, can be accessed deterministically and can be simulated using the Lugiato Lefever equation. In most recent work EPFL/MSU have demonstrate Soliton propagation effects, and generated 2/3 of an octave frequency comb directly from a chip based microresonator. Building on these recent advances, the present proposal provides a framework to intensify the collaboration by proposing a joint experimental research program to address two new frontiers of microresonator frequency combs.First, we seek to demonstrate the generation of broadband frequency combs via soliton induced Cherenkov radiation in the mid IR, i.e. the molecular fingerprinting region. For this purpose MSU will fabricate especially designed crystalline belt resonators, that will be pumped with quantum cascade laser sources. Quantum Cascade Lasers are a revolutionary pump source in the mid IR that are commercially available, operate at room temperature and have narrow linewidth. Yet, they cannot achieve stable and reliable mode locking. By combining the QCL with a Kerr microresonator, broadband combs can be generated via soliton formation that are coherent. This work will have the potential to lead to unprecedentedly broad combs in the mid IR that can be used for molecular spectroscopy or dual comb spectroscopy. Preliminary results by EPFL have already demonstrated comb like spectra as wide as 200 cm(-1) in the mid IR. By using soliton formation and soliton induced Cherenkov radiation, comb spectra could be generated that are fully coherent and can exceed likely 1000 cm(-1), making it the broadest coherent comb spectrum directly synthesized using a QCL. To achieve soliton formation the crystalline resonator will be dispersion engineered via precision shaping of the diamond protrusions; which can be accomplished using the newly installed diamond precision turning machine at the Russian Quantum Centre by Professor Gorodetsky, while testing can be achieved in the mid IR equipped laboratory at EPFL.Second, we will investigate to achieve coherent comb formation in the normal dispersion regime, i.e. in the visible wavelength range; where microresonator frequency combs could be used for spectroscopy in the water window. Due to the absorption peaks in the UV almost all known dielectric materials have normal group velocity dispersion in the IR, thus preventing soliton formation. Recently Prof. Gorodetsky demonstrated theoretically a new class of dark pulses, called ‘flaticons’, that exist in the normal GVD regime. Here we propose to experimentally demonstrate this class of solitons (in experiments at the Russian Quantum Centre lead by Gorodetsky) using the SiN microresonators platform from EPFL. Summarizing, Prof. Kippenberg and Gorodetsky share already a proven and highly fruitful collaboration that has led to more than a dozen joint high impact papers. The present proposal would represent the first formal funding to be received by the two groups for their dedicated efforts in Kerr frequency combs that started in 2008, and would enable to intensify the collaboration in the vibrant and fast developing field of microresonator frequency combs. The research will be carried out both at MSU and EPFL and will utilize crystalline resonators fabricated at the Russian Quantum Science Centre - in the newly established experimental laboratory from Gorodetsky - and use SiN chipscale microresonators fabricated at EPFL. The work will be carried out by one PhD student at each node, with the support of one postdoctoral scholar for a limited amount of time. The research project could lead to compact, broadband and coherent frequency comb generators in the molecular fingerprinting regime, as well as the visible regime and extend the use of compact combs to new application, including spectroscopy, Raman spectral imaging or chemical analysis.