Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session S09: NanophotonicsLive
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Chair: Xu Yi, UVA |
Thursday, June 3, 2021 10:30AM - 10:42AM Live |
S09.00001: Multiphoton probing of complex quantum emitters Tomas Ramos, Juan Jose Garcia-Ripoll Controlling the interaction between single quantum emitters and single photons in nanophotonic environments is routinely achieved in many labs around the world. Nevertheless, the characterization of those interactions is typically limited to measure single-photon transmission, second order correlations, or pump-probe experiments. Developing more sophisticated two- or multi-photon probing protocols [1] can allow us, for instance, to quantify complex photon-photon interactions and correlations induced by quantum emitters [2] or to characterize the operation of nonlinear nanophotonic devices. |
Thursday, June 3, 2021 10:42AM - 10:54AM Live |
S09.00002: Towards Stationary Optomechanical Entanglement of a Levitated Nanosphere Inside an Optical Cavity Kahan M Dare, Manuel Reisenbauer, Corentin Gut, Klemens Winkler, Yuriy Coroli, Aisling Johnson, Uros Delic, Markus Aspelmeyer The rapid development of quantum optomechanics has seen the creation of many new experimental platforms which are uniquely tailored to study fundamental questions [1] and act as quantum sensors [2]. Within this field, levitated systems provide a compelling architecture due to their flexibility and isolation from their environment. Recently, we cooled an optically levitated massive object to its quantum ground state [3], a task which was made possible by a new technique called cavity cooling by coherent scattering. We endeavor to build upon this work by generating stationary optomechanical entanglement using this same coupling mechanism. In this talk, I will present our recent work towards demonstrating such entanglement using a silica nanoparticle inside of an optical cavity. The experimental realization of the procedure outlined in [4] for inferring entanglement between the light and mechanics will be detailed and the next steps will discussed. |
Thursday, June 3, 2021 10:54AM - 11:06AM Live |
S09.00003: Coherent generation of single photons using a single silicon-vacancy color-center in a diamond nanophotonic cavity Can M Knaut, Daniel Assumpcao, Rivka Bekenstein, Mihir K Bhaskar, Erik Knall, Bartholomeus J Machielse, Wenjie Gong, David Levonian, Pieter-Jan C Stas, Yan Qi Huan, Ralf Riedinger, Hongkun Park, Marko Lončar, Mikhail Lukin
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Thursday, June 3, 2021 11:06AM - 11:18AM Live |
S09.00004: Point-Defect Localized Photonic Bound States in the Continuum Sachin Vaidya, Wladimir A Benalcazar, Alexander W Cerjan, Mikael C Rechtsman Photonic crystals (PhCs) with defect modes are known to exhibit exceptional confinement and transport properties enabling devices such as high-Q resonators, PhC fibers and spectral filters. Typically, these properties require the spectral isolation of defect modes within a bandgap which requires the use of materials with a high dielectric contrast. However, it has been shown in various systems that confinement can occur even in the absence of bandgaps using bound states in the continuum (BICs), which are states that remain perfectly bound to the system despite residing in a continuum of radiating states. BICs localized to point defects could enable the construction of devices such as fibers and ultra-high-Q nanocavities with gapless PhC designs that employ low-index materials. |
Thursday, June 3, 2021 11:18AM - 11:30AM Live |
S09.00005: Magnetic field-free non-reciprocal Raman amplification of fiber-guided light enabled by chirally coupled spin-polarized atoms Christian Liedl, Sebastian Pucher, Shuwei Jin, Arno Rauschenbeutel, Philipp Schneeweiss Non-reciprocal elements are key components for fiber-optical networks and integrated optical chips. For example, they allow one to protect lasers from harmful optical feedback and to implement optical add-drop multiplexers or cascaded quantum systems. A novel class of such non-reciprocal elements utilizes the internal spin of quantum emitters in order to break Lorentz reciprocity. |
Thursday, June 3, 2021 11:30AM - 11:42AM Live |
S09.00006: Guided Cold Atom Inertial Sensor Platforms with Membrane Integrated Photonics and Nanofibers Jongmin Lee, Adrian S Orozco, William F Kindel, Nicholas Karl, Jonathan D Sterk, Weng Chow, Jau Yuan-Yu, Grant Biedermann, Michael Gehl Guided cold atom inertial sensor platforms with evanescent fields can be widely used for atomic positioning, navigation and timing (PNT) sensors due to its low SWaP condition, scalability and modularity. In particular, guided atom interferometers enable to operate accelerometers and gyroscopes in dynamic environments. To achieve an evanescent-field optical dipole trap (EF-ODT) and guided cold atom inertial sensors, membrane integrated photonics have been developed for efficient heat dissipation at the suspended waveguide and sufficient atom loading around the waveguide. Here we demonstrate a suspended waveguide with a large membrane and a center opening for atom loading and validate low-loss and centimeter-long waveguides to mitigate heat load of the EF-ODT in vacuum. We also report the demonstration of a MOT within a sub-millimeter membrane hole and a sub-millimeter gap between two silicon needle structure, and these novel membrane and hybrid-needle structures can handle the heat load issue in vacuum. In addition, we study atomic coherence, e.g., Rabi and Ramsey measurements, of 1-D evanescently guided atoms by using a nanofiber platform. |
Thursday, June 3, 2021 11:42AM - 11:54AM Live |
S09.00007: Quantum control of an optically levitated nanoparticle Uros Delic Owing to its excellent isolation from the thermal environment, an optically levitated silica nanoparticle in ultra-high vacuum has been proposed to observe quantum behavior of massive objects at room temperature, with applications ranging from sensing to testing fundamental physics. As a first step towards quantum state preparation of the nanoparticle motion, both cavity and feedback cooling methods have been used to attempt cooling to its motional ground state, albeit with many technical difficulties. We have recently developed a new experimental interface, which combines stable (and arbitrary) trapping potentials of optical tweezers with the cooling performance of optical cavities, and demonstrated operation at desired experimental conditions [1]. In addition, we implement a novel optomechanical scheme in cavity levitated optomechanics – cavity cooling by coherent scattering – which we employ to demonstrate ground state cooling of the nanoparticle motion [2, 3]. In this talk I will present our latest experimental result on motional ground state cooling of a levitated nanoparticle and discuss next steps toward macroscopic quantum states. |
Thursday, June 3, 2021 11:54AM - 12:06PM Live |
S09.00008: Super-extended nano fiber-guided field for coherent coupling to hot atoms Ran Finkelstein, Gal Winer, Eilon Poem, Arno Rauschenbeutel, Barak Dayan, Ofer Firstenberg Light-matter interaction can be enhanced by using a tight optical mode and by collective coupling of this mode to an ensemble of atoms. While reduced mode volumes are achieved in small optical cavities or with tightly focused beams in free space, they are typically incompatible with large ensembles of atoms due to the associated short Rayleigh range. An alternative approach employs a tightly confined optical mode that is supported by a low-loss waveguide over an extended length. When coupled to thermal vapor, the transverse motion of the atoms through the optical mode results in transit-time broadening and in a reduction of the absorption cross-section. |
Thursday, June 3, 2021 12:06PM - 12:18PM Live |
S09.00009: Trapping and controlling atoms on microring circuits for nanophotonic cavity QED HIKARU TAMURA, Tzu-Han Chang, Xinchao Zhou, Ming Zhu, Chen-Lung Hung The integration of cold neutral atoms with nanophotonic circuits offers significant potential as a light-matter interface for a wide range of applications, from studies of atom-photon interactions and quantum many-body physics to quantum networks. These opportunities are enabled through direct engineering of photon transport on waveguides, and enhancing photonic density of states in nanophotonic resonators for realizing strong and cooperative atom-light coupling. Our approach is based on high-quality silicon nitride microring resonators fabricated on a transparent membrane substrate and coupled to a fiber network. The circuit is fully compatible with laser cooling and trapping atoms. We have realized direct loading of cold atoms into an optical tweezer lattice formed on a microring circuit. An optical conveyor-belt technique is implemented to deliver trapped atoms to the near field of a resonator mode. We will present our experimental progress towards realizing coupling trapped atoms with a microring circuit. |
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