OPTICA Memoranda

41 results
  • High-temporal-resolution X-ray spectroscopy with free-electron and optical lasers

    Rivas, Daniel E.; Serkez, Svitozar; Baumann, Thomas M.; Boll, Rebecca; Czwalinna, Marie Kristin; Dold, Simon; de Fanis, Alberto; Gerasimova, Natalia; Grychtol, Patrik; Lautenschlager, Björn; Lederer, Maximilian; Jezynksi, Tomasz; Kane, Daniel; Mazza, Tommaso; Meier, Joachim; Müller, Jost; Pallas, Florent; Rompotis, Dimitrios; Schmidt, Philipp; Schulz, Sebastian; Usenko, Sergey; Venkatesan, Sandhya; Wang, Jinxiong; Meyer, Michael
    • 2022
    • Optica 9(4) 429-430  View: HTML | PDF

    Ultrafast X-ray spectroscopies require flexible X-ray properties together with high temporal and spectral resolution. Here, we demonstrate simultaneous sub-20 fs and sub-eV resolutions for pump/probe ...

  • Dual-polarization thin-film lithium niobate in-phase quadrature modulators for terabit-per-second transmission

    Xu, Mengyue; Zhu, Yuntao; Pittalà, Fabio; Tang, Jin; He, Mingbo; Ng, Wing Chau; Wang, Jingyi; Ruan, Ziliang; Tang, Xuefeng; Kuschnerov, Maxim; Liu, Liu; Yu, Siyuan; Zheng, Bofang; Cai, Xinlun
    • 2022
    • Optica 9(1) 61-62  View: HTML | PDF
    Cited by: 3

    We report, to our knowledge, the first dual-polarization thin-film lithium niobate coherent modulator for next-generation optical links with sub-1-V driving voltage and 110-GHz bandwidth, enabling a r...

  • Free-space coupled superconducting nanowire single-photon detector with low dark counts

    Mueller, Andrew S.; Korzh, Boris; Runyan, Marcus; Wollman, Emma E.; Beyer, Andrew D.; Allmaras, Jason P.; Velasco, Angel E.; Craiciu, Ioana; Bumble, Bruce; Briggs, Ryan M.; Narvaez, Lautaro; Peña, Cristián; Spiropulu, Maria; Shaw, Matthew D.
    • 2021
    • Optica 8(12) 1586-1587  View: HTML | PDF
    Cited by: 2

    A free-space coupled superconducting nanowire single-photon detector with high efficiency at 1550 nm, sub-0.1 Hz dark count rate, and sub-15 ps timing jitter is demonstrated....

  • Scan multiplier unit for ultrafast laser scanning beyond the inertia limit

    Xiao, Sheng; Davison, Ian; Mertz, Jerome
    • 2021
    • Optica 8(11) 1403-1404  View: HTML | PDF [Suppl. Mat. (2)]
    Cited by: 1

    A passive add-on greatly multiplies the sweep rate of any mechanical scanner while also enhancing throughput, enabling a single linear scanner to produce ultrafast 1D or 2D laser scans for general app...

  • Top-down convergence of near-infrared photonics with silicon substrate-integrated electronics

    Bernard, Martino; Acerbi, Fabio; Paternoster, Giovanni; Piccoli, Gioele; Gemma, Luca; Brunelli, Davide; Gola, Alberto; Pucker, Georg; Pancheri, Lucio; Ghulinyan, Mher
    • 2021
    • Optica 8(11) 1363-1364  View: HTML | PDF
    Cited by: 1

    On-chip direct coupling of dielectric waveguides to Si substrate-integrated photodetectors has been realized within a top-down approach. A first-run 44% external quantum efficiency at 850 nm is shown ...

  • Top-down convergence of near-infrared photonics with silicon substrate-integrated electronics

    Bernard, Martino; Acerbi, Fabio; Paternoster, Giovanni; Piccoli, Gioele; Gemma, Luca; Brunelli, Davide; Gola, Alberto; Pucker, Georg; Pancheri, Lucio; Ghulinyan, Mher
    • 2021
    • Optica 8(10) 1363-1364  View: HTML | PDF

    On-chip direct coupling of dielectric waveguides to Si substrate-integrated photodetectors has been realized within a top-down approach. A first-run 44% external quantum efficiency at 850 nm is shown ...

  • III/V-on-lithium niobate amplifiers and lasers

    Op de Beeck, Camiel; Mayor, Felix M.; Cuyvers, Stijn; Poelman, Stijn; Herrmann, Jason F.; Atalar, Okan; McKenna, Timothy P.; Haq, Bahawal; Jiang, Wentao; Witmer, Jeremy D.; Roelkens, Gunther; Safavi-Naeini, Amir H.; Van Laer, Raphaël; Kuyken, Bart
    • 2021
    • Optica 8(10) 1288-1289  View: HTML | PDF
    Cited by: 1

    We demonstrate electrically pumped, heterogeneously integrated lasers on thin-film lithium niobate, featuring electro-optic wavelength tunability....

  • Single-photon avalanche diode imaging sensor for subsurface fluorescence LiDAR

    Bruza, Petr; Petusseau, Arthur; Ulku, Arin; Gunn, Jason; Streeter, Samuel; Samkoe, Kimberley; Bruschini, Claudio; Charbon, Edoardo; Pogue, Brian
    • 2021
    • Optica 8(8) 1126-1127  View: HTML | PDF
    Cited by: 2

    We realized subsurface fluorescence LiDAR with a large format single-photon avalanche diode array capable of localizing and quantifying concentration of fluorescent molecules in heavily scattering med...

  • CMOS-foundry-based blue and violet photonics

    Morin, Theodore J.; Chang, Lin; Jin, Warren; Li, Chenlei; Guo, Joel; Park, Hyundai; Tran, Minh A.; Komljenovic, Tin; Bowers, John E.
    • 2021
    • Optica 8(5) 755-756  View: HTML | PDF
    Cited by: 7

    We demonstrate a CMOS-foundry-based ${\rm{S}}{{\rm{i}}_3}{{\rm{N}}_4}$ S i 3 ...

  • How large is the quantum enhancement of two-photon absorption by time-frequency entanglement of photon pairs?

    Raymer, Michael G.; Landes, Tiemo; Allgaier, Markus; Merkouche, Sofiane; Smith, Brian J.; Marcus, Andrew H.
    • 2021
    • Optica 8(5) 757-758  View: HTML | PDF
    Cited by: 12

    We present a theoretical proof that the “quantum enhancement” of two-photon absorption, thought to be a means to improve molecular spectroscopy and imaging, is tightly bounded by the physics of photon...

  • Reconfigurable carbon quantum emitters from CO2 gas reduced via surface plasmons

    Walia, Jaspreet; Rashid, Sabaa; Killaire, Graham; Variola, Fabio; Weck, Arnaud; Berini, Pierre
    • 2021
    • Optica 8(5) 708-709  View: HTML | PDF
    Cited by: 1

    Silver gratings supporting surface plasmons at 532 nm catalyze the formation of light-emitting solid carbon from ${\rm CO}_2$ C O 2 gas, revealing a low-ener...

  • Gain mechanism in time-dependent media

    Pendry, J. B.; Galiffi, E.; Huidobro, P. A.
    • 2021
    • Optica 8(5) 636-637  View: HTML | PDF
    Cited by: 6

    Conventionally, time-dependent systems add energy to electromagnetic waves by parametric amplification. Here we identify a distinct, alternative mechanism—compression of lines of force....

  • High-performance quantum-dot distributed feedback laser on silicon for high-speed modulations

    Liang, Di; Srinivasan, Sudharsanan; Descos, Antoine; Zhang, Chong; Kurczveil, Geza; Huang, Zhihong; Beausoleil, Raymond
    • 2021
    • Optica 8(5) 591-593  View: HTML | PDF
    Cited by: 9

    We report a 1310 nm heterogeneous quantum-dot distributed feedback laser on silicon with high efficiency and modulation capability and demonstrate isolator-free external modulation at 25 Gb/s using a ...

  • 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: 10

    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: 14

    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: 21

    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: 10

    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: 9

    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: 16

    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: 60

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