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Träfflista för sökning "WFRF:(Takabayashi A. Y.) "

Sökning: WFRF:(Takabayashi A. Y.)

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2.
  • Quack, N., et al. (författare)
  • Silicon photonic MEMS : Exploiting mechanics at the nanoscale to enhance photonic integrated circuits
  • 2019
  • Ingår i: Optics InfoBase Conference Papers. - Washington, D.C. : OSA - The Optical Society.
  • Konferensbidrag (refereegranskat)abstract
    • With the maturing and the increasing complexity of Silicon Photonics technology, novel avenues are pursued to reduce power consumption and to provide enhanced functionality: exploiting mechanical movement in advanced Silicon Photonic Integrated Circuits provides a promising path to access a strong modulation of the effective index and to low power consumption by employing mechanically stable and thus non-volatile states. In this paper, we will discuss recent achievements in the development of MEMS enabled systems in Silicon Photonics and outline the roadmap towards reconfigurable general Photonic Integrated Circuits. 
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3.
  • Bogaerts, W., et al. (författare)
  • Low-Power Electro-Optic Actuators for Large-Scale Programmable Photonic Circuits
  • 2021
  • Ingår i: 2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Proceedings. - : Institute of Electrical and Electronics Engineers Inc..
  • Konferensbidrag (refereegranskat)abstract
    • Photonic integrated circuits are becoming increasingly more complex, especially with the emergence of programmable photonic circuits. These require many tunable photonic elements, such as electro-optic phase shifters and tunable couplers. We will discuss our progress in compact, low-power silicon photonics actuators based on heaters, liquid crystal and MEMS that can be scaled up to large circuits. 
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4.
  • Bogaerts, W., et al. (författare)
  • Programmable photonic circuits using silicon photonic MEMS
  • 2021
  • Ingår i: Optics InfoBase Conference Papers. - : The Optical Society.
  • Konferensbidrag (refereegranskat)abstract
    • We present a silicon photonics technology extended with low-power MEMS scalable to large circuits. This enables us to make photonic waveguide meshes that can be reconfigured using electronics and software.
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5.
  • Khan, U., et al. (författare)
  • Large scale programmable photonic circuits using silicon photonic MEMS
  • 2022
  • Ingår i: 2022 Conference on Lasers and Electro-Optics, CLEO 2022. - : Institute of Electrical and Electronics Engineers Inc..
  • Konferensbidrag (refereegranskat)abstract
    • We demonstrate low-power and non-volatile MEMS actuators on an industrially established silicon photonics platform. The compact electrostatically actuated phase shifters and tunable couplers enable large-scale programmable photonic integrated circuits. 
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6.
  • Sasada, T., et al. (författare)
  • Possible involvement of thioredoxin reductase as well as thioredoxin in cellular sensitivity to cis-diamminedichloroplatinum (II)
  • 1999
  • Ingår i: Free Radical Biology & Medicine. - : Elsevier. - 0891-5849 .- 1873-4596. ; 27:5-6, s. 504-514
  • Tidskriftsartikel (refereegranskat)abstract
    • The thioredoxin (TRX) system, composed of nicotinamide adenine dinucleotide phosphate (reduced form), TRX, and TRX reductase (TRXR), has multiple biologic functions via thiol-mediated redox control. In this study, we investigated the relationship between intracellular TRXR levels and cellular sensitivity to cis-diamminedichloroplatinum (II) (CDDP). HeLa, a human cervical carcinoma cell line, cultured with CDDP showed a time- and dose-dependent reduction of intracellular TRXR activity, which was well correlated with the decrease in cell viability after exposure to CDDP. In a cell-free system, CDDP was found to directly inactivate the reduced form of purified human TRXR. The CDDP-resistant variants of HeLa cells, established by continuous exposure to CDDP, exhibited an increased expression and activity of TRXR as well as TRX compared with the parental cells. In addition, sodium selenate, an inhibitor of TRXR, was found to increase the susceptibility to CDDP in the CDDP-resistant cells. Moreover, the HeLa cells transfected with an antisense TRXR RNA expression vector to reduce the intracellular enzyme activity displayed an enhanced sensitivity to CDDP. Taken together with previous reports on TRX, these results indicate the possible involvement of TRXR as well as TRX in the cellular sensitivity and resistance to CDDP.
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7.
  • Edinger, Pierre, et al. (författare)
  • Compact low loss MEMS phase shifters for scalable field-programmable silicon photonics
  • 2020
  • Ingår i: Optics InfoBase Conference Papers. - : The Optical Society.
  • Konferensbidrag (refereegranskat)abstract
    • MEMS offer low power tunability to silicon photonics. However, reported phase shifters lack in range, IL, or linearity. We show π linear phase shift in compact, 0.2 dB-IL MEMS devices, and demonstrate trade-offs for scalability.
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8.
  • Edinger, Pierre, et al. (författare)
  • Silicon photonic MEMS phase shifter with µs time constant built on a foundry platform
  • 2021
  • Ingår i: Optics InfoBase Conference Papers. - : The Optical Society.
  • Konferensbidrag (refereegranskat)abstract
    • MEMS enable low power tuners in silicon photonics, but existing phase shifters lack in range, speed, and loss. We implement a 2π phase shifter with a 1.54 µs time constant and 0.5 dB insertion loss in IMEC's iSiPP50G platform.
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9.
  • Errando-Herranz, Carlos, 1989-, et al. (författare)
  • MEMS for Photonic Integrated Circuits
  • 2020
  • Ingår i: IEEE Journal of Selected Topics in Quantum Electronics. - : IEEE Press. - 1077-260X .- 1558-4542. ; 26:2, s. 1-16
  • Tidskriftsartikel (refereegranskat)abstract
    • The field of microelectromechanical systems (MEMS) for photonic integrated circuits (PICs) is reviewed. This field leverages mechanics at the nanometer to micrometer scale to improve existing components and introduce novel functionalities in PICs. This review covers the MEMS actuation principles and the mechanical tuning mechanisms for integrated photonics. The state of the art of MEMS tunable components in PICs is quantitatively reviewed and critically assessed with respect to suitability for large-scale integration in existing PIC technology platforms. MEMS provide a powerful approach to overcome current limitations in PIC technologies and to enable a new design dimension with a wide range of applications.
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10.
  • Quack, N., et al. (författare)
  • Scalable Nano-Opto-Electromechanical Systems in Silicon Photonics
  • 2021
  • Ingår i: 2021 IEEE Photonics Conference, IPC 2021 - Proceedings. - : Institute of Electrical and Electronics Engineers (IEEE).
  • Konferensbidrag (refereegranskat)abstract
    • Recent advances in integration of Nano-Opto-Electromechanical Systems in Silicon Photonics enable fundamental photonic operations such as switching, phase shifting or power equalization on-chip. The unique combination of high optical efficiency, low electric power consumption and compact footprint, provides outstanding opportunities in scalability to large-scale photonic integrated circuits.
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