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7th Workshop on Nanotube Optics and Nanospectroscopy (WONTON 2018)

8–12 Jul 2018
The Prince Hakone Lake Ashinoko
Asia/Tokyo timezone

Contribution List

66 out of 66 displayed
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  1. 10. Optics and Photonics of Aligned Carbon Nanotube Films
    Prof. Junichiro Kono (Rice University)
    09/07/2018, 09:00
    Invited Talk
  2. 36. Mid- and high-temperature exciton photophysics of carbon nanotubes and their applications
    Yuhei Miyauchi
    09/07/2018, 09:30
    Invited Talk
  3. 62. Tunable Interlayer Excitons in Folded & Twisted Graphene
    Prof. Matt Graham (Oregon State University, Physics)
    09/07/2018, 10:00
    Contributed Talk
  4. 44. Trions at a Trapping Defect
    Prof. YuHuang Wang (University of Maryland)
    09/07/2018, 10:40
    Invited Talk
  5. 3. Molecular design for photoluminescence modulation of locally functionalized single-walled carbon nanotubes
    Dr Tomohiro Shiraki (Kyushu University)
    09/07/2018, 11:10
    Invited Talk
  6. 25. Nonperturbing, conjugation-preserving covalent functionalization of single-walled carbon nanotubes
    Dr Antonio Setaro (Freie Universität Berlin)
    09/07/2018, 11:40
    Contributed Talk

    The most common outcome of covalent treatments of carbon nanotubes is the conversion of sp2 carbon atoms into their sp3 hybridization state. Even mild approaches interrupt the conjugation of the carbon network with detrimental effects on their optoelectronic properties. Cycloaddition reactions establish covalent bonds through pi-electrons to bridge targeted functionalities onto the tubes. The...

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  7. 57. Electroluminescence from carbon nanotubes
    Prof. Ralph Krupke (Karlsruhe Institute of Technology and Technische Universitat Darmstadt)
    09/07/2018, 14:00
    Invited Talk

    Electrically generated light emission from carbon nanotubes is of great interest for the development of nanoscale on-chip electro-optical transducers and single-photon sources [1,2], operating in the telecom band and at GHz frequency [3]. To further advance device performance, reproducibility and reliability we need to better understand and control the mechanism of light generation, tailor the...

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  8. 66. Electrochemically doped light-emitting devices of transition metal dichalcogenide monolayers
    Prof. Taishi Takenobu (Nagoya University)
    09/07/2018, 14:30
    Invited Talk
  9. 43. Probing exciton-exciton annihilation in hBN with cathodoluminescence experiments
    Alexandre Plaud (ONERA-CNRS / UVSQ-CNRS)
    09/07/2018, 15:00
    Contributed Talk
  10. 52. Bright and tunable single-photon emission with a carbon nanotube embedded in a fiber micro-cavity.
    Christophe Voisin (Ecole Normale Supérieure, Paris)
    09/07/2018, 15:40
    Invited Talk
  11. 42. Spectroscopy of localized excitons in cryogenic carbon nanotubes
    Alexander Hoegele (LMU Munich)
    09/07/2018, 16:10
    Invited Talk
  12. 53. Room-temperature single photon emission from carbon nanotubes
    Dr Akihiro Ishii (RIKEN)
    09/07/2018, 16:40
    Contributed Talk

    Single-walled carbon nanotubes are a promising material as quantum light sources at room temperature and as nanoscale light sources for integrated photonic circuits on silicon. Here we discuss the use of carbon nanotubes as room-temperature single photon emitters from two different approaches. The first is where efficient exciton-exciton annihilation process [1] is used to reduce the number of...

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  13. 16. Cavity-control of bright and dark interlayer excitons in van der Waals heterostructures
    Mr Michael Förg (Ludwig-Maximilians-Universität Munich)
    09/07/2018, 17:00

    Monolayer transition metal dichalcogenides integrated in optical microcavities host exciton-polaritons as a hallmark of the strong light-matter coupling regime [1]. Analogous concepts for hybrid light-matter systems employing spatially indirect excitons with a permanent electric dipole moment in heterobilayer crystals promise realizations of exciton-polariton gases and condensates with...

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  14. 8. Cryogenic spectroscopy of sp3 defect states in carbon nanotubes
    Manuel Nutz (Ludwig-Maximilians-University Munich)
    09/07/2018, 17:00

    Photoactive defect states in semiconducting single-walled carbon nanotubes (CNTs) have the potential to enable novel applications in quantum photonic technologies. While early experiments have established cryogenic CNTs as quantum light emitters [1], more recent work has identified luminescent defect states as sources of single photons up to room temperature [2,3]. For chemically-engineered...

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  15. 30. Effect of functionalization and subsequent thermal treatment on photoluminescence properties of single-walled carbon nanotubes
    Dr Yutaka Maeda (Department of Chemistry, Tokyo Gakugei University)
    09/07/2018, 17:00
  16. 54. Enhanced Raman scattering of graphene using double resonance in silicon photonic crystal nanocavities
    Dr Widianta Gomulya (Nanoscale Quantum Photonics Laboratory, RIKEN)
    09/07/2018, 17:00
  17. 20. Evaluation of substituent effects on the potential levels of locally-functionalized single-walled carbon nanotubes using in situ photoluminescence spectroelectrochemistry
    Mr Tomonari Shiraishi (Kyushu University)
    09/07/2018, 17:00
  18. 12. High-Speed and integrated graphene blackbody emitters
    Yusuke Fukazawa
    09/07/2018, 17:00
  19. 28. Kinetics of diazonium functionalization of carbon nanotubes
    Ms Kerstin Müller (Julius Maximilian University Würzburg, Germany)
    09/07/2018, 17:00
  20. 46. Modulation-Doped Multiple Quantum Wells of Aligned Single-Wall Carbon Nanotubes
    Ms Natsumi Komatsu (Rice University)
    09/07/2018, 17:00
  21. 60. Monolayer WSe2-MoS2 Lateral Heterojunction Light-Emitting Diodes
    Dr Jiang Pu (Nagoya University)
    09/07/2018, 17:00
  22. 22. Optical properties of core-shell systems based on carbon nanotubes
    Lucile Orcin-Chaix
    09/07/2018, 17:00
  23. 24. Optical Properties of Oxidized Single-Wall Carbon Nanotubes
    Mari Ohfuchi (Fujitsu Labs.)
    09/07/2018, 17:00
  24. 14. Photon antibunching in single-walled carbon nanotubes at telecommunication wavelengths and room temperature
    Rintaro Kawabe (Hideyuki Maki Group in Keio University (Department of Applied Physics and Physico-Informatics,Faculty of Science and Technology)
    09/07/2018, 17:00
  25. 2. Photophysical properties of porphyrin–single-walled carbon nanotube linked systems with various spacer lengths
    Prof. Tomokazu Umeyama (Kyoto University)
    09/07/2018, 17:00
  26. 6. Thin films from carbon nanotubes of highly tuned structure and properties
    Dr Dawid Janas (Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland)
    09/07/2018, 17:00

    Due to remarkable electrical, thermal, optical and other properties of carbon nanotubes they have attracted significant interest from research groups all over the world. However, to implement them in the real life, we still need better methods to control their structure at the nanoscale and also techniques to turn these highly defined materials into macroscopic ensembles. In this contribution,...

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  27. 56. Tracing individual growth process of single-walled carbon nanotubes by digitally coding isotope labels
    Dr Keigo Otsuka (The University of Tokyo)
    09/07/2018, 17:00
  28. 34. Luttinger liquid in carbon nanotubes
    Prof. Feng Wang (University of California, Berkeley)
    10/07/2018, 09:00
    Invited Talk

    Single Walled carbon nanotubes provide the ideal platform to explore Luttinger liquid physics due to the strong one-dimensional quantum confinement. I will discuss out combined electrical and optical studies to correlate the unusual electron tunneling and plasmon excitations of a Luttinger liquid. I will also show that distinctly different plasmon behavior in electrically gated metallic and...

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  29. 50. Single SWNT spectroscopy for nano-metrology
    Prof. Yoshikazu Homma (Department of Physics, Tokyo University of Science)
    10/07/2018, 09:30
    Invited Talk
  30. 4. Conservation law of angular momentum in Raman spectroscopy using circularly polarized light
    Prof. Riichiro Saito (Tohoku University)
    10/07/2018, 10:00
    Contributed Talk
  31. 11. Exciton-Polaritons, Plexcitons and Trion-Polaritons in Single-Walled Carbon Nanotube Thin Films and Devices
    Prof. Jana Zaumseil (Heidelberg University)
    10/07/2018, 10:40
    Invited Talk
  32. 33. Excitons in Coupled Nanotube Photovoltaic Thin Films
    Prof. Michael Arnold
    10/07/2018, 11:10
    Invited Talk

    We have previously reported on the efficient harvesting of excitons from photoexcited, semiconducting nanotube thin films. The films are interfaced with C60 fullerenes to form a type-II heterojunction with band offsets that exceed the exciton binding energy. Excitons photogenerated near the heterointerface are dissociated into separable electrons (which transfer to C60) and holes (which remain...

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  33. 15. Theory of a carbon-nanotube polarization switch
    Ken-ichi Sasaki (NTT Basic Research Laboratories)
    10/07/2018, 11:40
    Contributed Talk
  34. 49. Transition metal dichalcogenide nanotubes
    Yoshi Iwasa (The University of Tokyo & RIKEN)
    11/07/2018, 09:00
    Invited Talk

    Due to their favorable and rich electronic and optical properties, group-VI-B transition-metal dichalcogenides (TMDs) have attracted considerable interest. They have earned their position in the materials portfolio of the spintronics and valleytronics communities. The electrical performance of TMDs will be enhanced by rolling up the two-dimensional (2D) sheets to form quasi-one-dimensional...

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  35. 0. Stacking-dependent Interlayer Couplings in 2D Materials
    Prof. Liu Kaihui (Peking University)
    11/07/2018, 09:30
    Invited Talk
  36. 17. Controlling the optical fingerprint of transition metal dichalcogenides via molecules, strain and disorder
    Maja Feierabend (Chalmers )
    11/07/2018, 10:00
    Contributed Talk
  37. 41. Carbon Nanotube Optical Bandgap Modulation for Cancer Research and Diagnosis
    Prof. Daniel Heller (Memorial Sloan Kettering Cancer Center)
    11/07/2018, 10:40
    Invited Talk

    The measurement of biomarkers, drugs, and metabolites in live cells and organisms would allow for improvements in disease detection, drug development, and biomedical research. Single-walled carbon nanotubes have suitable optical properties for application as sensors for use in live cells and in vivo, including narrow, near-infrared emission bands with sensitivity to the local environment. To...

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  38. 70. Probing the optical dipole transition and vibrational coherences in individual (5,4) carbon nanotubes by femtosecond pulse shaping
    Dr Richard Ciesielski (Ludwig-Maximilians-Universität München)
    11/07/2018, 11:10
    Contributed Talk
  39. 13. H<sub>2</sub>-evolving SWCNT Photocatalysts for Effective Use of Solar Energy
    Yutaka Takaguchi (Okayama University)
    11/07/2018, 11:30
    Contributed Talk
  40. 29. Killer defects in semiconducting SWNTs
    Prof. Tobias Hertel (Institute of Physical and Theoretical Chemistry)
    11/07/2018, 14:00
    Invited Talk

    The doping of semiconductors is key for providing electronic and photonic devices with their desired functionality. This comes with the realization, that the failure to successfully dope certain classes of materials “is an important bottleneck for the technological utilization of these materials” in electronic or photonic devices, as succinctly expressed by Zunger [1]. This concern also...

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  41. 39. Nanoscale Imaging in, of & with Luminescent Single Walled Carbon Nanotubes
    Laurent Cognet (University of Bordeaux)
    11/07/2018, 14:30
    Invited Talk
  42. 51. Antenna-Controlled Antibunching in the Photoluminescence of Single Carbon Nanotubes
    Prof. Achim Hartschuh (LMU Munich)
    11/07/2018, 15:00
    Contributed Talk
  43. 64. Optical properties of dyes confined into carbon and boron nitride nanotubes
    Dr Etienne Gaufres (CNRS)
    11/07/2018, 15:40
    Invited Talk

    The inner cavity of nanotubes has been used as a template for the encapsulation of elongated dyes molecules, such as polythiophenes (6T). The 1D confinement of the nanotube wall drives the stacking of the molecules and induces original aggregation effects in their optical properties [1,2]. When confined inside a carbon nanotube, the organics dyes exhibit for instance a surprisingly strong...

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  44. 1. Diameter-dependent optical absorption and energy transfer from encapsulated dye molecules to single wall carbon nanotubes
    Prof. Sofie Cambré (University of Antwerp)
    11/07/2018, 16:10
    Invited Talk
  45. 58. Synthesis and properties of single-walled carbon nanotubes co-axially wrapped with mono- and few-layer BN nanotubes
    Prof. Shigeo Maruyama (The University of Tokyo)
    11/07/2018, 16:40
    Contributed Talk
  46. 67. Achieving 20% Efficiency Perovskite Solar Cells with High Stability by using Semiconducting Single-walled Carbon Nanotube Grain Bridges
    Dr Il Jeon (The University of Tokyo)
    11/07/2018, 17:00

    Since liquid-junction perovskite solar cells (PSCs), the development of organo-lead halide perovskite photovoltaics research has gained momentum with the achievement of the solid-state PSCs in 2012. High absorption coefficient, long-range diffusion length and high defect tolerance of PSCs enable remarkable certified power conversion efficiencies (PCEs) over 20%. Although PSCs are proven to be...

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  47. 35. Dielectric properties of vertically aligned carbon nanotubes in the mid-IR and THz spectral range
    Prof. Hartmut Roskos (Physics Institute, Goethe-University )
    11/07/2018, 17:00
  48. 68. Effects of Chirality and Defect Introduction on the Intermediate Frequency Mode
    Dr Takumi Inaba (Tokyo University of Science)
    11/07/2018, 17:00

    An intermediate frequency mode (IFM) of single-walled carbon nanotubes (SWCNTs) has intriguing properties. The IFM originates from a phonon branch that has acoustic nature in graphene, and has non-zero momentum. Phonons with these properties are usually not analyzable with photons. However, the IFM of SWCNTs was successfully observed in prior reports [1, 2]. Remarkable features of the IFM may...

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  49. 7. Environmental electrometry with luminescent carbon nanotubes
    Jonathan Noe (Ludwig-Maximilian University Munich)
    11/07/2018, 17:00

    We demonstrate that localized excitons in luminescent carbon nanotubes can be utilized to study electrostatic fluctuations in the nanotube environment with sensitivity down to the elementary charge. By monitoring the temporal evolution of the cryogenic photoluminescence from individual carbon nanotubes grown on silicon oxide and hexagonal boron nitride we characterize the dynamics of charge...

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  50. 69. Long-lived direct and indirect interlayer excitons in van der Waals heterostructures
    Ursula Wurstbauer
    11/07/2018, 17:00
  51. 45. Molecular screening effects on trion binding energies and electronic band gaps in air-suspended carbon nanotubes
    Dr Shunsuke Tanaka (Quantum Optoelectronics Research Team, RIKEN Center for Advanced Photonics)
    11/07/2018, 17:00
  52. 47. Narrow-band thermal exciton radiation in individual suspended single-walled carbon nanotubes
    Dr Taishi Nishihara (Nagoya University)
    11/07/2018, 17:00
  53. 5. Phonon Assigning of G-band from Suspended Single-walled Carbon Nanotubes
    Mr Yuichiro Tanaka (Department of Physics, Tokyo University of Science)
    11/07/2018, 17:00
  54. 9. Photocurrent Spectroscopy of Dye Sensitized Carbon Nanotubes
    Dr Benjamin Flavel (Karlsruhe Institute of Technology)
    11/07/2018, 17:00

    Monochiral (7,5) single walled carbon nanotubes (SWCNTs) are integrated into a field effect transistor device in which the built-in electric field at the nanotube:metal contact allows for exciton separation under external light bias. Variable wavelength spectroscopy and 2D surface mapping of devices consisting of 10 – 20 nanotubes is performed in the visible, and a strong correlation between...

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  55. 59. Photoluminescence from Single-walled Carbon Nanotubes on hexagonal Boron Nitride Substrates
    Shohei Chiashi (The University of Tokyo)
    11/07/2018, 17:00

    Photoluminescence (PL) spectroscopy is one of the important analysis techniques for the optical properties of single-walled carbon nanotubes (SWNTs). However, PL spectra are measured only from surfactant-wrapped SWNTs [1], suspended SWNTs [2], and vertically-aligned SWNTs [3]. For optical and opto-electronic applications of SWNTs, SWNTs which lie on substrates and emit PL signal are needed. In...

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  56. 19. Post modification approach for photoluminescence modulation of locally functionalized single-walled carbon nanotubes
    Mr Tamehito Shiga (Kyushu University)
    11/07/2018, 17:00
  57. 23. Probing the optical dipole transition and vibrational coherences in individual (5,4) carbon nanotubes by femtosecond pulse shaping
    Dr Richard Ciesielski (Ludwig-Maximilians-Universität München)
    11/07/2018, 17:00
  58. 55. Reflectance of Carbon Nanotube Forest metamaterials
    Hiroshi Furuta (School of Systems Engineering, Kochi University of Technology)
    11/07/2018, 17:00

    CNT forest of high emissivity, nearly ideal “black-body absorber[1]”, is attracting researchers as a candidate material for the future application of high-sensitive sensor, thermal energy storage device[2], and so on. Recently, metamaterials, electro-magnetic circuit to the incident EM-wave, opened a method to design desired optical properties. We recently reported CNT forest metamaterial in...

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  59. 65. Resonance Raman Signature of Intertube Excitons in Compositionally-Defined Carbon Nanotube Bundles
    Dr Jeffrey R. Simpson (Towson University and National Institute of Standards & Technology)
    11/07/2018, 17:00

    Electronic interactions in low-dimensional nanomaterial heterostructures can lead to novel optical responses arising from exciton delocalization over the constituent materials. Similar phenomena have been suggested to arise between closely interacting semiconducting carbon nanotubes of identical structure. Such behavior in carbon nanotubes has potential to generate new exciton physics, impact...

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  60. 21. Spectral tuning of optical coupling between air-mode nanobeam cavities and individual carbon nanotubes
    Hidenori Machiya (Nanoscale Quantum Photonics Laboratory, RIKEN)
    11/07/2018, 17:00

    We design high quality factor air-mode nanobeam cavities by finite-difference time-domain simulations, and utilize the cavities to enhance the emission of air-suspended carbon nanotubes [1]. The cavities are fabricated from silicon-on-insulator wafers, and nanotubes are synthesized over the cavities by chemical vapor deposition. Photoluminescence spectroscopy is performed on the devices, where...

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  61. 37. Photo-induced interactions between SWCNTs and oxygen
    R. Bruce Weisman (Rice University)
    12/07/2018, 09:00
    Invited Talk
  62. 48. Environmental Effects on Photoluminescence Properties of Carbon Nanotube sp3 Defects
    Stephen Doorn
    12/07/2018, 09:30
    Invited Talk
  63. 18. Direct Determination of Chemically Induced Doping Concentrations in (6,5)- Single-Wall Carbon Nanotubes by EPR
    Dr Andreas Sperlich (Julius Maximilian University of Würzburg, Germany)
    12/07/2018, 10:00
    Contributed Talk

    Control over doping of semiconducting Single-Wall Carbon Nanotubes (SWNTs) by (electro-) chemical methods and intrinsic impurities are considered to be crucial for future applications of SWNTs in carbon-based electronics and photonics. Previous indirect all-optical techniques hypothesize charge carrier localization in semiconducting (6,5)-SWNTs following redox chemical AuCl3 doping, which is...

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  64. 63. Long-lived Charge Separation Across Interfaces with Semiconducting Single-walled Carbon Nanotubes
    Dr Jeffrey Blackburn (National Renewable Energy Laboratory)
    12/07/2018, 10:40
    Invited Talk

    Semiconducting single-walled carbon nanotubes (s-SWCNTs) are attractive absorbers for use in solar energy harvesting schemes because of their strong and energetically tunable optical absorption, and high charge carrier mobilities due to the delocalized nature of the π-electron system. Beyond their technological potential, s-SWCNTs offer attractive properties for fundamental studies of charge...

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  65. 38. PL quantum yield of SWCNTs: photon reabsorption effect
    Dr Hiromichi Kataura (NMRI, AIST)
    12/07/2018, 11:10
    Invited Talk
  66. 40. DNA-wrapped carbon nanotubes for sorting and multiplex optical sensing
    Ming Zheng
    Invited Talk