OPTICA Memoranda

48 results
  • Erbium dopants in nanophotonic silicon waveguides

    Weiss, Lorenz; Gritsch, Andreas; Merkel, Benjamin; Reiserer, Andreas
    • 2021
    • Optica 8(1) 40-41  View: HTML | PDF
    Cited by: 41

    We perform resonant spectroscopy of erbium implanted into nanophotonic silicon waveguides, finding 1 GHz inhomogeneous broadening and homogeneous linewidths below 0.1 GHz. Our study thus introduces a ...

  • Electronic–photonic convergence for silicon photonics transmitters beyond 100 Gbps on–off keying

    Li, Ke; Liu, Shenghao; Thomson, David J.; Zhang, Weiwei; Yan, Xingzhao; Meng, Fanfan; Littlejohns, Callum G.; Du, Han; Banakar, Mehdi; Ebert, Martin; Cao, Wei; Tran, Dehn; Chen, Bigeng; Shakoor, Abdul; Petropoulos, Periklis; Reed, Graham T.
    • 2020
    • Optica 7(11) 1514-1516  View: HTML | PDF
    Cited by: 49

    We present design concepts for optical modulators without using any equalization or bespoke fabrication techniques. The demonstrated silicon photonics transmitter can operate at 100 Gbps OOK, while th...

  • Photorealistic full-color nanopainting enabled by a low-loss metasurface

    Huo, Pengcheng; Song, Maowen; Zhu, Wenqi; Zhang, Cheng; Chen, Lu; Lezec, Henri J.; Lu, Yanqing; Agrawal, Amit; Xu, Ting
    • 2020
    • Optica 7(9) 1171-1172  View: HTML | PDF
    Cited by: 51

    We realize a dielectric metasurface that enables full-color generation and ultrasmooth brightness variation. The reproduced artwork “girl with a pearl earring” features photorealistic color representa...

  • Polarization-insensitive ultra-broadband mode filter based on a 3D graphene structure buried in an optical waveguide

    Huang, Quandong; Chiang, Kin Seng
    • 2020
    • Optica 7(7) 744-745  View: HTML | PDF
    Cited by: 22

    We propose a polarization-insensitive ultra-broadband mode filter based on a 3D graphene structure buried in a few-mode optical waveguide. Our experimental device fabricated by burying an L-shaped gra...

  • Femtosecond timing synchronization at megahertz repetition rates for an x-ray free-electron laser

    Sato, Tokushi; Letrun, Romain; Kirkwood, Henry J.; Liu, Jia; Vagovič, Patrik; Mills, Grant; Kim, Yoonhee; Takem, Cedric M. S.; Planas, Marc; Emons, Moritz; Jezynski, Tomasz; Palmer, Guido; Lederer, Max; Schulz, Sebastian; Mueller, Jost; Schlarb, Holger; Silenzi, Alessandro; Giovanetti, Gabriele; Parenti, Andrea; Bergemann, Martin; Michelat, Thomas; Szuba, Janusz; Grünert, Jan; Chapman, Henry N.; Mancuso, Adrian P.
    • 2020
    • Optica 7(6) 716-717  View: HTML | PDF
    Cited by: 15

    A critical challenge of pump-probe experiments with x-ray free-electron lasers (XFELs) is accurate synchronization of x-ray and optical pulses. At the European XFEL we observed megahertz rat...

  • Heterogeneous silicon nitride photonics

    Park, Hyundai; Zhang, Chong; Tran, Minh A.; Komljenovic, Tin
    • 2020
    • Optica 7(4) 336-337  View: HTML | PDF
    Cited by: 21

    We solve one of the key photonic challenges–bringing wafer-scale electrically pumped optical sources to a silicon nitride photonic platform with the world’s first demonstration of electrically pumped ...

  • Sub-wavelength GHz-fast broadband ITO Mach–Zehnder modulator on silicon photonics

    Amin, Rubab; Maiti, Rishi; Gui, Yaliang; Suer, Can; Miscuglio, Mario; Heidari, Elham; Chen, Ray T.; Dalir, Hamed; Sorger, Volker J.
    • 2020
    • Optica 7(4) 333-335  View: HTML | PDF
    Cited by: 97

    Here we demonstrate a spectrally broadband, gigahertz-fast Mach–Zehnder interferometric modulator exhibiting a miniscule ${{\rm V}_\pi }{\rm L}$ V π ...

  • Large-area, high-numerical-aperture multi-level diffractive lens via inverse design

    Meem, Monjurul; Banerji, Sourangsu; Pies, Christian; Oberbiermann, Timo; Majumder, Apratim; Sensale-Rodriguez, Berardi; Menon, Rajesh
    • 2020
    • Optica 7(3) 252-253  View: HTML | PDF
    Cited by: 54

    Flat lenses enable thinner, lighter, and simpler imaging systems. However, large-area and high-NA flat lenses have been elusive due to computational and fabrication challenges. Here we appli...

  • Enhanced laser–plasma interactions using non-imaging optical concentrator targets

    MacPhee, Andrew G.; Alessi, David; Chen, Hui; Cochran, Ginevra; Hermann, Mark R.; Kalantar, Daniel H.; Kemp, Andreas J.; Kerr, Shaun M.; Link, Anthony J.; Ma, Tammy; Mackinnon, Andrew J.; Mariscal, Derek A.; Schlossberg, David; Tommasini, Riccardo; Vonhof, Scott; Widmayer, Clifford C.; Wilks, Scott C.; Jackson Williams, G.; Williams, Wade H.; Youngblood, Kelly
    • 2020
    • Optica 7(2) 129-130  View: HTML | PDF
    Cited by: 15

    Picosecond-scale laser–matter interactions using compound parabolic concentrators have demonstrated strongly relativistic ponderomotive effects with $\sim{10} \times $ ∼ ...

  • Narrow-linewidth III-V/Si/Si3N4 laser using multilayer heterogeneous integration

    Xiang, Chao; Jin, Warren; Guo, Joel; Peters, Jonathan D.; Kennedy, M. J.; Selvidge, Jennifer; Morton, Paul A.; Bowers, John E.
    • 2020
    • Optica 7(1) 20-21  View: HTML | PDF
    Cited by: 105

    We demonstrate a novel ${\rm III} {\text -} {\rm V}/{\rm Si}/{{\rm Si}_3}{{\rm N}_4}$ I I I - V / ...

  • Advanced apparatus for the integration of nanophotonics and cold atoms

    Béguin, J.-B.; Burgers, A. P.; Luan, X.; Qin, Z.; Yu, S. P.; Kimble, H. J.
    • 2020
    • Optica 7(1) 1-2  View: HTML | PDF
    Cited by: 10

    We combine nanophotonics and cold atom research in a new apparatus enabling the delivery of single-atom tweezer arrays in the vicinity of photonic crystal waveguides....

  • Time-variant metasurfaces enable tunable spectral bands of negative extinction

    Shcherbakov, Maxim R.; Lemasters, Robert; Fan, Zhiyuan; Song, Jia; Lian, Tianquan; Harutyunyan, Hayk; Shvets, Gennady
    • 2019
    • Optica 6(11) 1441-1442  View: HTML | PDF
    Cited by: 20

    We demonstrate that rapidly switched high- Q metasurfaces enable spectral regions of negative optical extinction....

  • Generation of three-cycle multi-millijoule laser pulses at 318 W average power

    Nagy, Tamas; Hädrich, Steffen; Simon, Peter; Blumenstein, Andreas; Walther, Nico; Klas, Robert; Buldt, Joachim; Stark, Henning; Breitkopf, Sven; Jójárt, Péter; Seres, Imre; Várallyay, Zoltán; Eidam, Tino; Limpert, Jens
    • 2019
    • Optica 6(11) 1423-1424  View: HTML | PDF
    Cited by: 102

    The generation of three-cycle multi-millijoule pulses at 318 W power is reported by compressing pulses of a Yb-fiber chirped pulse amplifier in a 6 m long stretched flexible hollow fiber. This techniq...

  • Ultra-efficient frequency conversion in quasi-phase-matched lithium niobate microrings

    Chen, Jia-Yang; Ma, Zhao-Hui; Sua, Yong Meng; Li, Zhan; Tang, Chao; Huang, Yu-Ping
    • 2019
    • Optica 6(9) 1244-1245  View: HTML | PDF
    Cited by: 145

    We demonstrate quasi-phase-matched frequency conversion in a chip-integrated lithium niobate microring resonator, whose normalized efficiency reaches 230,000%/W or 10−6 per single photon....

  • Optical trapping assisted detection rate enhancement of single molecules on a nanopore optofluidic chip

    Rahman, M.; Harrington, M.; Stott, M. A.; Li, Y.; Sampad, M. J. N.; Yuzvinsky, T. D.; Hawkins, A. R.; Schmidt, H.
    • 2019
    • Optica 6(9) 1130-1131  View: HTML | PDF
    Cited by: 7

    We use optical trapping to deliver molecular targets to the vicinity of a nanopore for high-throughput single molecule analysis on an optofluidic chip. DNA detection rates increase over 80× to enable ...

  • Reverberant cavity photoacoustic imaging

    Brown, M. D.; Zhang, E. Z.; Treeby, B. E.; Beard, P. C.; Cox, B. T.
    • 2019
    • Optica 6(6) 821-822  View: HTML | PDF
    Cited by: 11

    The number of ultrasound detectors required to produce photoacoustic tomography images can be reduced significantly by fully enclosing the imaging target in an acoustically reverberant cavity and expl...

  • Kerr-lens mode locking above a 20 GHz repetition rate

    Kimura, Shota; Tani, Shuntaro; Kobayashi, Yohei
    • 2019
    • Optica 6(5) 532-533  View: HTML | PDF
    Cited by: 33

    We present a compact, Kerr-lens mode-locked oscillator consisting of a three-element optical setup and demonstrate femtosecond pulse generation at a repetition rate of 23.8 GHz....

  • Octave-spanning Cr:ZnS femtosecond laser with intrinsic nonlinear interferometry

    Vasilyev, Sergey; Moskalev, Igor; Smolski, Viktor; Peppers, Jeremy; Mirov, Mike; Fedorov, Vladimir; Martyshkin, Dmitry; Mirov, Sergey; Gapontsev, Valentin
    • 2019
    • Optica 6(2) 126-127  View: HTML | PDF
    Cited by: 33

    We report a few-cycle, super-octave, polycrystalline Cr:ZnS laser system with 4 W power at 78 MHz repetition rate, where all of the necessary optical signals for the measurement of the carrier–envelop...

  • Resonant excitation of quantum emitters in gallium nitride

    Kianinia, Mehran; Bradac, Carlo; Nguyen, Minh; Zhu, Tongtong; Toth, Milos; Oliver, Rachel; Aharonovich, Igor
    • 2018
    • Optica 5(8) 932-933  View: HTML | PDF

    We demonstrate resonant excitation of quantum emitters in gallium nitride (GaN). The emitters are stable under non-resonant excitation and exhibit nearly Fourier-transform-limited lines of ...

  • Gigahertz-repetition-rate soliton microcombs

    Suh, Myoung-Gyun; Vahala, Kerry
    • 2018
    • Optica 5(1) 65-66  View: HTML | PDF
    Cited by: 87

    Soliton microcombs with repetition rates as low as 1.86 GHz are demonstrated, thereby entering a regime more typical of table–top combs. Low rates are important in spectroscopy and relax requirements ...