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| 1 | Photonic microwave true time delays for phased array antennas using a 49 GHz FSR integrated optical micro-comb source[Invited]显示文摘We demonstrate significantly improved performance of a microwave true time delay line based on an integrated optical frequency comb source. The broadband micro-comb(over 100 nm wide) features a record low free spectral range(FSR) of 49 GHz, resulting in an unprecedented record high channel number(81 over the C band)—the highest number of channels for an integrated comb source used for microwave signal processing. We theoretically analyze the performance of a phased array antenna and show that this large channel count results in a high angular resolution and wide beam-steering tunable range. This demonstrates the feasibility of our approach as a competitive solution toward implementing integrated photonic true time delays in radar and communications systems. | XINGYUAN Xu JIAYANG Wu THACH G.NGUYEN TANIA MOEIN SAI T.CHU BRENT E.LITTLE ROBERTO MORANDOTTI ARNAN MITCHELL DAVID J.Moss | 2018 | Photonics Research2018，6，5： | 4 |
| 2 | Single‐pixel terahertz imaging:a review显示文摘This paper is devoted to reviewing the results achieved so far in the application of the single-pixel imaging technique to terahertz(THz)systems.The use of THz radiation for imaging purposes has been largely explored in the last twenty years,due to the unique capabilities of this kind of radiation in interrogating material properties.However,THz imaging systems are still limited by the long acquisition time required to reconstruct the object image and significant efforts have been recently directed to overcome this drawback.One of the most promising approaches in this sense is the so-called“single-pixel”imaging,which in general enables image reconstruction by patterning the beam probing the object and measuring the total transmission(or reflection)with a single-pixel detector(i.e.,with no spatial resolution).The main advantages of such technique are that i)no bulky moving parts are required to raster-scan the object and ii)compressed sensing(CS)algorithms,which allow an appropriate reconstruction of the image with an incomplete set of measurements,can be successfully implemented.Overall,this can result in a reduction of the acquisition time.In this review,we cover the experimental solutions proposed to implement such imaging technique at THz frequencies,as well as some practical uses for typical THz applications. | Luca Zanotto Riccardo Piccoli Junliang Dong Roberto Morandotti Luca Razzari | 2020 | Opto-Electronic Advances2020，3，9： | 4 |
| 3 | Optical force-induced nonlinearity and self-guiding of light in human red blood cell suspensions显示文摘Osmotic conditions play an important role in the cell properties of human red blood cells(RBCs),which are crucial for the pathological analysis of some blood diseases such as malaria.Over the past decades,numerous efforts have mainly focused on the study of the RBC biomechanical properties that arise from the unique deformability of erythrocytes.Here,we demonstrate nonlinear optical effects from human RBCs suspended in different osmotic solutions.Specifically,we observe self-trapping and scattering-resistant nonlinear propagation of a laser beam through RBC suspensions under all three osmotic conditions,where the strength of the optical nonlinearity increases with osmotic pressure on the cells.This tunable nonlinearity is attributed to optical forces,particularly the forward-scattering and gradient forces.Interestingly,in aged blood samples(with lysed cells),a notably different nonlinear behavior is observed due to the presence of free hemoglobin.We use a theoretical model with an optical force-mediated nonlocal nonlinearity to explain the experimental observations.Our work on light self-guiding through scattering biosoft-matter may introduce new photonic tools for noninvasive biomedical imaging and medical diagnosis. | Rekha Gautam Yinxiao Xiang Josh Lamstein Yi Liang Anna Bezryadina Guo Liang Tobias Hansson Benjamin Wetzel Daryl Preece Adam White Matthew Silverman Susan Kazarian Jingjun Xu Roberto Morandotti Zhigang Chen | 2019 | Light(Science & Applications)2019，8，1： | 3 |
| 4 | Integrated sources of photon quantum states based on nonlinear optics显示文摘The ability to generate complex optical photon states involving entanglement between multiple optical modes is not only critical to advancing our understanding of quantum mechanics but will play a key role in generating many applications in quantum technologies.These include quantum communications,computation,imaging,microscopy and many other novel technologies that are constantly being proposed.However,approaches to generating parallel multiple,customisable bi-and multi-entangled quantum bits(qubits)on a chip are still in the early stages of development.Here,we review recent advances in the realisation of integrated sources of photonic quantum states,focusing on approaches based on nonlinear optics that are compatible with contemporary optical fibre telecommunications and quantum memory platforms as well as with chip-scale semiconductor technology.These new and exciting platforms hold the promise of compact,low-cost,scalable and practical implementations of sources for the generation and manipulation of complex quantum optical states on a chip,which will play a major role in bringing quantum technologies out of the laboratory and into the real world. | Lucia Caspani Chunle Xiong Benjamin J Eggleton Daniele Bajoni Marco Liscidini Matteo Galli Roberto Morandotti David J Moss | 2017 | Light(Science & Applications)2017，6，1： | 3 |
| 5 | Free-space realization of tunable pin-like optical vortex beams显示文摘We demonstrate,both analytically and experimentally,free-space pin-like optical vortex beams (POVBs). Such angular-momentum-carrying beams feature tunable peak intensity and undergo robust antidiffracting propagation,realized by judiciously modulating both the amplitude and the phase profile of a standard laser beam.Specifically,they are generated by superimposing a radially symmetric power-law phase on a helical phase structure,which allows the inclusion of an orbital angular momentum term to the POVBs. During propagation in free space,these POVBs initially exhibit autofocusing dynamics,and subsequently their amplitude patterns morph into a high-order Bessel-like profile characterized by a hollow core and an annular main lobe with a constant or tunable width during propagation. In contrast with numerous previous endeavors on Bessel beams,our work represents the first demonstration of long-distance free-space generation of optical vortex 'pins' with their peak intensity evolution controlled by the impressed amplitude structure. Both the Poynting vectors and the optical radiation forces associated with these beams are also numerically analyzed,revealing novel properties that may be useful for a wide range of applications. | DOMENICO BONGIOVANNI DENGHUI LI MIHALIS GOUTSOULAS HAO WU YI HU DAOHONG SONG ROBERTO MORANDOTTI NIKOLAOS KEFREMIDIS ZHIGANG CHEN | 2021 | Photonics Research2021，9，7： | 2 |
| 6 | Ultrafast alloptical differentiators显示文摘 | Slavik R Park Y Kulishov M Morandotti R Aza(n)ia J | | 0，，22： | 1 |
| 7 | On-chip CMOS-compatible all-optical integrator显示文摘 | Ferrera M Park Y Razzari L Little B E Chu S T Morandotti R Moss D J Aza(n)a J | | 0，，29： | 1 |
| 8 | Type-Ⅱmicro-comb generation in a filter-driven four wave mixing laser[Invited]显示文摘We experimentally demonstrate the generation of highly coherent Type-II micro-combs based on a microresonator nested in a fiber cavity loop, known as the filter-driven four wave mixing(FD-FWM) laser scheme.In this system, the frequency spacing of the comb can be adjusted to integer multiples of the free-spectral range(FSR) of the nested micro-resonator by properly tuning the fiber cavity length. Sub-comb lines with single FSR spacing around the primary comb lines can be generated. Such a spectral emission is known as a 'Type-II comb'.Our system achieves a fully coherent output. This behavior is verified by numerical simulations. This study represents an important step forward in controlling and manipulating the dynamics of an FD-FWM laser. | HUALONG BAO ANDREW COOPER SAI T.CHU DAVE J.Moss ROBERTO MORANDOTTI BRENT E.LITTLE MARCO PECClANTI ALESSIA PASQUAZI | 2018 | Photonics Research2018，6，5： | 1 |
| 9 | Self-focusing and Defocusing in Waveguide Arrays 显示文摘 | MORANDOTTI R | 2001 | Phys Rev Lett2001，86，： | 1 |
| 10 | Diffraction Management显示文摘 | Eisenberg H S Silberberg Y Morandotti R | 2000 | Phys Rev Lett2000，85，9： | 1 |
| 11 | 查看详情显示文摘 | Zhang P Hu Y Cannan D Salandrino A Li T C Morandotti R Zhang X Chen Z G | | 0，，： | 1 |
| 12 | Discrete Spatial Optical Solitons in Waveguide Arrays 显示文摘 | Eisenberg H S Silberberg Y Morandotti R | 1998 | Phys Rev Lett1998，81，33： | 1 |
| 13 | Temporal Talbot phenomena in high-order dispersive media 显示文摘 | D Duchesne R Morandotti J Azaa | 2007 | J Opt Soc Am B2007，24，1： | 1 |
| 14 | Quantum and classical correlations in waveguide lattices显示文摘 | Bromberg Y Lahini Y Morandotti R | 2009 | Physical Review Letters2009，102，25： | 1 |
| 15 | Discrete spatial optical solitons in waveguide arrays 显示文摘 | Eisenberg H S Silberberg Y Morandotti R | 1998 | Physical Review Letters1998，81，： | 1 |
| 16 | Diffraction management显示文摘 | Silberberg S Morandotti Y R Silberbeng Y | 2000 | Physical Review Letters2000，85，： | 1 |
| 17 | Self--focusing and defocusjng in waveguide arrays显示文摘 | Morandotti R Eisenberg H S Sitberberg Y | 2001 | Physical Review Letters2001，86，： | 1 |
| 18 | Diffraction management显示文摘 | Eisenberg H S Silberberg Y Morandotti R | 2000 | Phys Rev Lett2000，85，： | 1 |
| 19 | Nonlinear control of photonic higher-order topological bound states in the continuum显示文摘Higher-order topological insulators(HOTIs)are recently discovered topological phases,possessing symmetry-protected corner states with fractional charges.An unexpected connection between these states and the seemingly unrelated phenomenon of bound states in the continuum(BICs)was recently unveiled.When nonlinearity is added to the HOTI system,a number of fundamentally important questions arise.For example,how does nonlinearity couple higher-order topological BICs with the rest of the system,including continuum states?In fact,thus far BICs in nonlinear HOTIs have remained unexplored.Here we unveil the interplay of nonlinearity,higher-order topology,and BICs in a photonic platform.We observe topological corner states that are also BICs in a laser-written second-order topological lattice and further demonstrate their nonlinear coupling with edge(but not bulk)modes under the proper action of both self-focusing and defocusing nonlinearities.Theoretically,we calculate the eigenvalue spectrum and analog of the Zak phase in the nonlinear regime,illustrating that a topological BIC can be actively tuned by nonlinearity in such a photonic HOTI.Our studies are applicable to other nonlinear HOTI systems,with promising applications in emerging topology-driven devices. | Zhichan Hu Domenico Bongiovanni Dario Jukić Ema Jajtić Shiqi Xia Daohong Song Jingjun Xu Roberto Morandotti Hrvoje Buljan Zhigang Chen | 2021 | Light(Science & Applications)2021，10，9： | 1 |
| 20 | In vitro activity of azithromycin against Chlamydia trachomatis,Ureaplasma urealyticum and Mycoplasma hominis in comparison with erythromycin,roxithromycin and minocycline显示文摘 | Rumpianesi F Morandotti G Sperning R | 1993 | J Chemother1993，5，3： | 1 |
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