@article {4124, title = {Nanomechanical state amplifier based on optical inverted pendulum}, journal = {Communications Physics}, volume = {8}, year = {2025}, pages = {276}, keywords = {LF, MF}, issn = {2399-3650}, doi = {10.1038/s42005-025-02193-z}, url = {https://www.nature.com/articles/s42005-025-02193-z}, author = {Ducha{\v n}, Martin and {\v S}iler, Martin and J{\'a}kl, Petr and Brzobohat{\'y}, Oto and Rakhubovsky, Andrey and Filip, Radim and Zem{\'a}nek, Pavel} } @article {3907, title = {PT-like phase transition and limit cycle oscillations in non-reciprocally coupled optomechanical oscillators levitated in vacuum}, journal = {Nat. Phys.}, year = {2024}, note = {

Publisher: Nature Publishing Group

}, pages = {1{\textendash}7}, abstract = {

Nanoparticles levitated in an optical trap provide a versatile platform to study mechanical oscillators in a controlled environment with tuneable parameters. Recently, it has become possible to couple two of these optomechanical oscillators. Here we demonstrate the collective non-Hermitian dynamics of such a pair of non-conservatively coupled oscillators. We take advantage of the tunability of the optical interactions between the particles in our system and set the optical interaction between the particles to be purely non-reciprocal. By continuously varying the relative power of the trapping beams, we take the system through a transition similar to a parity{\textendash}time phase transition. A Hopf bifurcation at a critical point results in the formation of collective limit cycle oscillations, resembling those observed in phonon lasers. These coupled levitated oscillators provide a platform for exceptional point optomechanical sensing and can be extended to multi-particle systems, paving the way for the development of topological optomechanical media.

}, keywords = {LF, MF}, issn = {1745-2481}, doi = {10.1038/s41567-024-02590-1}, url = {https://www.nature.com/articles/s41567-024-02590-1}, author = {Li{\v s}ka, Vojt{\v e}ch and Zem{\'a}nkov{\'a}, Tereza and J{\'a}kl, Petr and {\v S}iler, Martin and Simpson, Stephen H. and Zem{\'a}nek, Pavel and Brzobohat{\'y}, Oto} } @article {3856, title = {Simulation of optomechanical interaction of levitated nanoparticle with photonic crystal micro cavity}, journal = {Opt. Express}, volume = {32}, year = {2024}, month = {Feb}, pages = {7185{\textendash}7196}, abstract = {

We propose and analyze theoretically a promising design of an optical trap for vacuum levitation of nanoparticles based on a one-dimensional (1D) silicon photonic crystal cavity (PhC). The considered cavity has a quadratically modulated width of the silicon wave guiding structure, leading to a calculated cavity quality factor of 8 {\texttimes} 105. An effective mode volume of approximately 0.16 μm3 having the optical field strongly confined outside the silicon structure enables optical confinement on nanoparticle in all three dimensions. The optical forces and particle-cavity optomechanical coupling are comprehensively analyzed for two sizes of silica nanoparticles (100 nm and 150 nm in diameter) and various mode detunings. The value of trapping stiffnesses in the microcavity is predicted to be 5 order of magnitudes higher than that reached for optimized optical tweezers, moreover the linear single photon coupling rate can reach MHz level which is 6 order magnitude larger than previously reported values for common bulk cavities. The theoretical results support optimistic prospects towards a compact chip for optical levitation in vacuum and cooling of translational mechanical degrees of motion for the silica nanoparticle of a diameter of 100 nm.

}, keywords = {LF, MF}, doi = {10.1364/OE.515202}, url = {https://opg.optica.org/oe/abstract.cfm?URI=oe-32-5-7185}, author = {Tade{\'a}{\v s} Ma{\v n}ka and Martin {\v S}iler and Vojt{\v e}ch Li{\v s}ka and Pavel Zem{\'a}nek and Mojm{\'\i}r {\v S}er{\'y} and Oto Brzobohat{\'y}} } @article {3753, title = {Cold damping of levitated optically coupled nanoparticles}, journal = {Optica}, volume = {10}, year = {2023}, pages = {1203{\textendash}1209}, keywords = {LF, MF}, doi = {10.1364/OPTICA.496072}, url = {https://opg.optica.org/optica/abstract.cfm?URI=optica-10-9-1203}, author = {Vojt{\v e}ch Li{\v s}ka and Tereza Zem{\'a}nkov{\'a} and Vojtech Svak and Petr J{\'a}kl and Jan Je{\v z}ek and Martin Br{\'a}neck{\'y} and Stephen H. Simpson and Pavel Zem{\'a}nek and Oto Brzobohat{\'y}} } @article {3730, title = {Roadmap for optical tweezers}, journal = {Journal of Physics: Photonics}, volume = {5}, year = {2023}, month = {apr}, pages = {022501}, keywords = {LF, MF}, doi = {10.1088/2515-7647/acb57b}, url = {https://dx.doi.org/10.1088/2515-7647/acb57b}, author = {Giovanni Volpe and Onofrio M Marag{\`o} and Halina Rubinsztein-Dunlop and Giuseppe Pesce and Alexander B Stilgoe and Giorgio Volpe and Georgiy Tkachenko and Viet Giang Truong and S{\'\i}le Nic Chormaic and Fatemeh Kalantarifard and Parviz Elahi and Mikael K{\"a}ll and Agnese Callegari and Manuel I Marqu{\'e}s and Antonio A R Neves and Wendel L Moreira and Adriana Fontes and Carlos L Cesar and Rosalba Saija and Abir Saidi and Paul Beck and J{\"o}rg S Eismann and Peter Banzer and Thales F D Fernandes and Francesco Pedaci and Warwick P Bowen and Rahul Vaippully and Muruga Lokesh and Basudev Roy and Gregor Thalhammer-Thurner and Monika Ritsch-Marte and Laura P{\'e}rez Garc{\'\i}a and Alejandro V Arzola and Isaac P{\'e}rez Castillo and Aykut Argun and Till M Muenker and Bart E Vos and Timo Betz and Ilaria Cristiani and Paolo Minzioni and Peter J Reece and Fan Wang and David McGloin and Justus C Ndukaife and Romain Quidant and Reece P Roberts and Cyril Laplane and Thomas Volz and Reuven Gordon and Dag Hanstorp and Javier Tello Marmolejo and Graham D Bruce and Kishan Dholakia and Tongcang Li and Oto Brzobohat{\'y} and Stephen H Simpson and Pavel Zem{\'a}nek and Felix Ritort and Yael Roichman and Valeriia Bobkova and Raphael Wittkowski and Cornelia Denz and G V Pavan Kumar and Antonino Foti and Maria Grazia Donato and Pietro G Gucciardi and Lucia Gardini and Giulio Bianchi and Anatolii V Kashchuk and Marco Capitanio and Lynn Paterson and Philip H Jones and Kirstine Berg-S{\o}rensen and Younes F Barooji and Lene B Oddershede and Pegah Pouladian and Daryl Preece and Caroline Beck Adiels and Anna Chiara De Luca and Alessandro Magazz{\`u} and David Bronte Ciriza and Maria Antonia Iat{\`\i} and Grover A Swartzlander} } @article {3754, title = {Synchronization of spin-driven limit cycle oscillators optically levitated in vacuum}, journal = {Nature Communications}, volume = {14}, year = {2023}, pages = {5441}, keywords = {LF, MF}, doi = {10.1038/s41467-023-41129-5}, url = {https://doi.org/10.1038/s41467-023-41129-5}, author = {Brzobohat{\'y}, Oto and Ducha{\v n}, Martin and J{\'a}kl, Petr and Je{\v z}ek, Jan and {\v S}iler, Martin and Zem{\'a}nek, Pavel and Simpson, Stephen H.} } @article {3416, title = {Stochastic dynamics of optically bound matter levitated in vacuum}, journal = {Optica}, volume = {8}, year = {2021}, month = {Feb}, pages = {220{\textendash}229}, keywords = {LF, MF}, doi = {10.1364/OPTICA.404851}, author = {Vojtech Svak and Jana Flaj{\v s}manov{\'a} and Luk{\'a}{\v s} Chv{\'a}tal and Martin {\v S}iler and Alexandr Jon{\'a}{\v s} and Jan Je{\v z}ek and Stephen H. Simpson and Pavel Zem{\'a}nek and Oto Brzobohat{\'y}} } @article {3363, title = {Complex colloidal structures with non-linear optical properties formed in an optical trap}, journal = {Opt. Express}, volume = {28}, year = {2020}, pages = {37700{\textendash}37707}, keywords = {LF, MF}, author = {Oto Brzobohat{\'y} and Luk{\'a}{\v s} Chv{\'a}tal and Martin {\v S}iler and Pavel Zem{\'a}nek} } @article {3335, title = {Using the transient trajectories of an optically levitated nanoparticle to characterize a stochastic Duffing oscillator}, journal = {Scientific Reports}, volume = {10}, year = {2020}, pages = {14436}, keywords = {LF, MF}, author = {Flaj{\v s}manov{\'a}, Jana and {\v S}iler, Martin and Jedli{\v c}ka, Petr and Hrub{\'y}, Franti{\v s}ek and Brzobohat{\'y}, Oto and Filip, Radim and Zem{\'a}nek, Pavel} } @article {DonatoNL19, title = {Optical Trapping, Optical Binding, and Rotational Dynamics of Silicon Nanowires in Counter-Propagating Beams}, journal = {Nano Lett.}, volume = {19}, year = {2019}, pages = {342-352}, keywords = {LF, MF}, doi = {10.1021/acs.nanolett.8b03978}, author = {Donato, Maria G. and Oto Brzobohat{\'y} and S. H. Simpson and Irrera, Alessia and Leonardi, Antonio A. and Lo Faro, Maria J. and Vojtech Svak and Marag{\`o}, Onofrio M. and P. Zem{\'a}nek} } @article { BrzobohatyOL19, title = {Optomechanical properties of optically self-arranged colloidal waveguides}, journal = {Opt. Lett.}, volume = {44}, year = {2019}, pages = {707-710}, keywords = {LF, MF}, doi = {10.1364/OL.44.000707}, author = {Oto Brzobohat{\'y} and Luk{\'a}{\v s} Chv{\'a}tal and P. Zem{\'a}nek} } @article {3188, title = {Perspective on light-induced transport of particles: from optical forces to phoretic motion}, journal = {Adv. Opt. Photon.}, volume = {11}, year = {2019}, month = {Sep}, pages = {577{\textendash}678}, keywords = {LF, MF}, doi = {10.1364/AOP.11.000577}, url = {http://aop.osa.org/abstract.cfm?URI=aop-11-3-577}, author = {Pavel Zem{\'a}nek and Giorgio Volpe and Alexandr Jon{\'a}{\v s} and Oto Brzobohat{\'y}} } @article { BrzobohatyACSPHOT19, title = {Tunable Soft-Matter Optofluidic Waveguides Assembled by Light}, journal = {ACS Phot.}, volume = {6}, year = {2019}, pages = {403-410}, keywords = {LF, MF}, doi = {10.1021/acsphotonics.8b01331}, author = {Oto Brzobohat{\'y} and Luk{\'a}{\v s} Chv{\'a}tal and A. Jon{\'a}{\v s} and M {\v S}iler and J. Ka{\v n}ka and J Je{\v z}ek and P. Zem{\'a}nek} } @article {3171, title = {Visualizing gravitational Bessel waves}, journal = {Physical Review D}, volume = {100}, year = {2019}, pages = {044050}, keywords = {LF, MF}, author = {Pat{\'a}k, Ale{\v s} and Zouhar, Martin and {\v R}ih{\'a}{\v c}ek, Tom{\'a}{\v s} and Brzobohat{\'y}, Oto and Ger{\v s}l, Jan and Campbell, Anna Charv{\'a}tov{\'a}} } @article {SilerPRL18, title = {Diffusing up the Hill: Dynamics and Equipartition in Highly Unstable Systems}, journal = {Phys. Rev. Lett.}, volume = {121}, year = {2018}, pages = {23601}, keywords = {LF, MF}, doi = {10.1103/PhysRevLett.121.230601}, author = {M {\v S}iler and Ornigotti, L. and Oto Brzobohat{\'y} and P J{\'a}kl and Artem Ryabov and Holubec, V. and P. Zem{\'a}nek and Radim Filip} } @article { DamkovaLSA18, title = {Enhancement of the {\textquoteleft}tractor-beam{\textquoteright} pulling force on an optically bound structure}, journal = {Light: Sci. Appl.}, volume = {7}, year = {2018}, pages = {17135}, keywords = {LF, MF}, doi = {10.1038/lsa.2017.135}, author = {Damkov{\'a}, Jana and Luk{\'a}{\v s} Chv{\'a}tal and J Je{\v z}ek and Oulehla, Jindrich and Oto Brzobohat{\'y} and P. Zem{\'a}nek} } @article {SvakNC18, title = {Transverse spin forces and non-equilibrium particle dynamics in a circularly polarized vacuum optical trap}, journal = {Nature Commun.}, volume = {9}, year = {2018}, pages = {5453}, keywords = {LF, MF}, doi = {10.1038/s41467-018-07866-8}, author = {Vojtech Svak and Oto Brzobohat{\'y} and M {\v S}iler and P J{\'a}kl and J. Ka{\v n}ka and P. Zem{\'a}nek and S. H. Simpson} } @article { KarasekOL17, title = {Dynamics of an optically bound structure made of particles of unequal sizes}, journal = {Opt. Lett.}, volume = {42}, number = {7}, year = {2017}, pages = {1436-1439}, keywords = {LF, MF}, issn = {0146-9592}, doi = {10.1364/OL.42.001436}, author = {V{\'\i}t{\v e}zslav Kar{\'a}sek and M {\v S}iler and Oto Brzobohat{\'y} and P. Zem{\'a}nek} } @article { SilerSR17, title = {Thermally induced micro-motion by inflection in optical potential}, journal = {Sci. Rep.}, volume = {7}, year = {2017}, pages = {1697}, keywords = {LF, MF}, issn = {2045-2322}, doi = {10.1038/s41598-017-01848-4}, author = {M {\v S}iler and P J{\'a}kl and Oto Brzobohat{\'y} and Artem Ryabov and Radim Filip and P. Zem{\'a}nek} } @article { BrzobohatyOE16, title = {Chiral particles in the dual-beam optical trap}, journal = {Opt. Express}, volume = {24}, year = {2016}, pages = {26382-26391}, keywords = {MF}, doi = {10.1364/OE.24.026382}, author = {Oto Brzobohat{\'y} and Hernandez, Raul Josue and S. H. Simpson and Mazzulla, Alfredo and Cipparrone, Gabriella and P. Zem{\'a}nek} } @article { ZemanekJOpt16, title = {Noise-to-signal transition of a Brownian particle in the cubic potential: II. optical trapping geometry}, journal = {Journal of Optics}, volume = {18}, number = {6}, year = {2016}, pages = {065402}, keywords = {MF}, doi = {10.1088/2040-8978/18/6/065401}, author = {P. Zem{\'a}nek and M {\v S}iler and Oto Brzobohat{\'y} and P J{\'a}kl and Radim Filip} } @article { ChvatalOR15, title = {Binding of a pair of Au nanoparticles in a wide Gaussian standing wave}, journal = {Opt. Rev.}, volume = {22}, year = {2015}, pages = {157-161}, keywords = {MF}, doi = {10.1007/s10043-015-0027-3}, author = {Luk{\'a}{\v s} Chv{\'a}tal and Oto Brzobohat{\'y} and P. Zem{\'a}nek} } @article { BrzobohatyOE15b, title = {Complex rotational dynamics of multiple spheroidal particles in a circularly polarized, dual beam trap}, journal = {Opt. Express}, volume = {23}, year = {2015}, pages = {7273-7287}, keywords = {MF}, doi = {10.1364/OE.23.007273}, author = {Oto Brzobohat{\'y} and Alejandro V. Arzola and M {\v S}iler and Luk{\'a}{\v s} Chv{\'a}tal and P J{\'a}kl and S. H. Simpson and P. Zem{\'a}nek} } @article { BrzobohatyOE15, title = {Non-spherical gold nanoparticles trapped in optical tweezers: shape matters}, journal = {Opt. Express}, volume = {23}, year = {2015}, pages = {8179-8189}, keywords = {MF}, doi = {10.1364/OE.23.008179}, author = {Oto Brzobohat{\'y} and M {\v S}iler and J. Trojek and Luk{\'a}{\v s} Chv{\'a}tal and V{\'\i}t{\v e}zslav Kar{\'a}sek and P. Zem{\'a}nek} } @article { BrzobohatySR15, title = {Three-Dimensional Optical Trapping of a Plasmonic Nanoparticle using Low Numerical Aperture Optical Tweezers}, journal = {Sci. Rep.}, volume = {5}, year = {2015}, pages = {8106}, keywords = {MF}, doi = {10.1038/srep08106}, author = {Oto Brzobohat{\'y} and M {\v S}iler and J. Trojek and Luk{\'a}{\v s} Chv{\'a}tal and V{\'\i}t{\v e}zslav Kar{\'a}sek and Ale{\v s} Pat{\'a}k and Zuzana Pokorn{\'a} and Filip Mika and P. Zem{\'a}nek} } @article { BrzobohatyNP13, title = {Experimental demonstration of optical transport, sorting and self-arrangement using a {\textquoteleft}tractor beam{\textquoteright}}, journal = {Nature Photon.}, volume = {7}, number = {2}, year = {2013}, pages = {123-127}, keywords = {MF}, doi = {10.1038/nphoton.2012.332}, author = {Oto Brzobohat{\'y} and V{\'\i}t{\v e}zslav Kar{\'a}sek and M {\v S}iler and Luk{\'a}{\v s} Chv{\'a}tal and Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and P. Zem{\'a}nek} } @article { BrzobohatyOL13, title = {Optical manipulation of aerosol droplets using a holographic dual and single beam trap}, journal = {Opt. Lett.}, volume = {38}, number = {22}, year = {2013}, pages = {4601-4604}, keywords = {MF}, doi = {10.1364/OL.38.004601}, author = {Oto Brzobohat{\'y} and M {\v S}iler and J Je{\v z}ek and P J{\'a}kl and P. Zem{\'a}nek} } @article {AasOE13, title = {Spectral tuning of lasing emission from optofluidic droplet microlasers using optical stretching}, journal = {Opt. Express}, volume = {21}, number = {18}, year = {2013}, pages = {21380-21394}, keywords = {MF}, doi = {10.1364/OE.21.021380}, author = {Mehdi Aas and A. Jon{\'a}{\v s} and Alper Kiraz and Oto Brzobohat{\'y} and J Je{\v z}ek and Z. Pil{\'a}t and P. Zem{\'a}nek} } @article { SilerOE12, title = {Optical forces induced behavior of a particle in a non-diffracting vortex beam}, journal = {Opt. Express}, volume = {20}, year = {2012}, pages = {24304-24319}, keywords = {MF}, doi = {10.1364/OE.20.024304}, author = {M {\v S}iler and P J{\'a}kl and Oto Brzobohat{\'y} and P. Zem{\'a}nek} } @article { BrzobohatyAPL11, title = {Dynamic size tuning of multidimensional optically bound matter}, journal = {Appl. Phys. Lett.}, volume = {99}, year = {2011}, pages = {101105}, keywords = {MF}, doi = {10.1063/1.3634007}, author = {Oto Brzobohat{\'y} and V{\'\i}t{\v e}zslav Kar{\'a}sek and Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and P. Zem{\'a}nek} } @article { CizmarLPL11, title = {The holographic optical micro-manipulation system based on counter-propagating beams}, journal = {Laser Phys. Lett.}, volume = {8}, year = {2011}, pages = {50{\textendash}56}, keywords = {MF}, doi = {10.1002/lapl.201010100}, author = {Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and Oto Brzobohat{\'y} and Kishan Dholakia and P. Zem{\'a}nek} } @article { BrzobohatyOE11, title = {Static and dynamic behavior of two optically bound microparticles in a standing wave}, journal = {Opt. Express}, volume = {19}, year = {2011}, pages = {19613{\textendash}19626}, keywords = {MF}, doi = {10.1364/OE.19.019613}, author = {Oto Brzobohat{\'y} and V{\'\i}t{\v e}zslav Kar{\'a}sek and M {\v S}iler and J. Trojek and P. Zem{\'a}nek} } @article { BrzobohatyOE10, title = {Experimental and theoretical determination of optical binding forces}, journal = {Opt. Express}, volume = {18}, number = {24}, year = {2010}, pages = {25389{\textendash}25402}, keywords = {MF}, issn = {1094-4087}, doi = {10.1364/OE.18.025389}, author = {Oto Brzobohat{\'y} and Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and V{\'\i}t{\v e}zslav Kar{\'a}sek and M {\v S}iler and Kishan Dholakia and P. Zem{\'a}nek} } @article { KarasekJOPA09, title = {Longitudinal optical binding of several spherical particles studied by the coupled dipole method}, journal = {J. Opt. A: Pure Appl. Opt.}, volume = {11}, year = {2009}, pages = {034009}, keywords = {MF}, doi = {10.1088/1464-4258/11/3/034009}, author = {V{\'\i}t{\v e}zslav Kar{\'a}sek and Oto Brzobohat{\'y} and P. Zem{\'a}nek} } @article { BrzobohatyOE08, title = {High quality quasi-Bessel beam generated by round-tip axicon}, journal = {Opt. Express}, volume = {16}, year = {2008}, pages = {12688{\textendash}12700}, keywords = {MF}, doi = {10.1364/OE.16.012688}, author = {Oto Brzobohat{\'y} and Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and P. Zem{\'a}nek} } @article { KarasekPRL08, title = {Long-range one-dimensional longitudinal optical binding}, journal = {Phys. Rev. Lett.}, volume = {101}, number = {14}, year = {2008}, pages = {143601}, keywords = {MF}, issn = {0031-9007}, doi = {10.1103/PhysRevLett.101.143601}, author = {V{\'\i}t{\v e}zslav Kar{\'a}sek and Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and Oto Brzobohat{\'y} and P. Zem{\'a}nek and V. Garc{\'e}s-Ch{\'a}vez and Kishan Dholakia} }