Optical computing and interconnects

Yatagai, Toyohiko; Kawai, S.; Huang, Hongxin

doi:10.1109/5.503141

Cited by 19 publications

(3 citation statements)

References 117 publications

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“…The inability to focus light more tightly than the diffraction limit (∼half the wavelength, ∼λ/2) currently restricts prospects for further shrinking optical devices. Because the physical conduits for optical information must be larger than λ/2 for transfer to take place, this effect severely limits optical computing, , fiber optic sensing, , and nanometer-scale optoelectronic processing. Although near-field optical probes − and exciton-transport materials have circumvented the diffraction limit by shrinking the exit aperture to nanoscale dimensions, these efforts have yet to produce broadly applicable tools for photon transport through nanoscale waveguides.…”

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confidence: 99%

Unidirectional Plasmon Propagation in Metallic Nanowires

2000

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We report the observation of unidirectional plasmon propagation in metallic nanowires over distances >10 µm. Through control of the incident excitation wavelength and rod composition, we demonstrate the selective coupling of photons into the plasmon mode of a 20 nm diameter nanowire. This mode then propagates in a nonemissive fashion down the wire length before being emitted as an elastically scattered photon at the distal end. As expected from previous studies of plasmon excitation in nanoparticles and thin films, we observe a strong wavelength and material dependence of this phenomenon. This metal-dependent plasmon propagation is exploited to produce a wire through which plasmons propagate unidirectionally. A bimetallic wire with a sharp Au/Ag heterojunction is shown to display both wavelength dependence and unidirectionality with respect to plasmon propagation across the heterojunction. It is expected that these results will contribute to the growing interest in optical energy transport in molecular-level and nanoscale devices.

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confidence: 99%

Unidirectional Plasmon Propagation in Metallic Nanowires

2000

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“…In recent decades diffractive optical elements have been used in many applications such as the manufacture of lenses and mirrors [1,2], broadband communications [3], optical computation [4] or information storage [5]. Because of the small sizes of these optical elements, rigorous electromagnetic computational methods are needed to obtain their diffraction efficiency.…”

Section: Introductionmentioning

confidence: 99%

Rigorous interference and diffraction analysis of diffractive optic elements using the finite-difference time-domain method

Francés

Neipp

Pérez-Molina

2010

Computer Physics Communications

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The Finite-Difference Time-Domain (FDTD) method has proven to be a useful tool to analyze electromagnetic scattering phenomena. In this work, the FDTD method is applied at optical wavelengths. More precisely, we present the results obtained using the FDTD algorithm to simulate the performance of optical devices such as volume diffraction gratings. The Perfectly Matched Layers (PML), Total-Field Scattered-Field formulation (TF/SF) and Near-Field to Far-Field transformation (NF/FF) are some addons included in order to correctly calculate the far field distribution obtained from the numerical near-field values computed in the simulation region. These values in the near-field region are computed by illuminating the grating with of a plane wave at the Bragg angle of incidence. In addition, we compare the results obtained by the FDTD method to those obtained using the Rigorous Coupled Wave Theory (RCWT) applied to diffraction gratings. As will be seen in this paper there is good agreement between the two approaches, thus validating our FDTD implementation.

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“…La miniaturización de los transistores en chips de silicio se está acercando a sus límites fundamentales y muchos investigadores ven en la computación óptica una posible alternativa, eso sí, a muy largo plazo [Gos03,Bre88,Yat96]. Para conseguir dispositivos fotónicos de computación se hace imprescindible el desarrollo de nuevas tecnologías de integración (nanotecnología).…”

Section: Flip-flops óPticos: Estado Del Arteunclassified

Flip-flops ópticos basados en interferómetros Mach-Zehnder activos con realimentación

Galindo¹

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Optical computing and interconnects

Cited by 19 publications

References 117 publications

Unidirectional Plasmon Propagation in Metallic Nanowires

Unidirectional Plasmon Propagation in Metallic Nanowires

Rigorous interference and diffraction analysis of diffractive optic elements using the finite-difference time-domain method

Flip-flops ópticos basados en interferómetros Mach-Zehnder activos con realimentación

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