Novelties of Light with Photonic Crystals

Joannopoulos, John D.; Fan, Shanhui; Mekis, Attila; Johnson, Steven G.

doi:10.1007/978-94-010-0738-2_1

Cited by 353 publications

(615 citation statements)

References 23 publications

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“…A perturbation of the dielectric permittivity Δε over a volume V is now assumed. Using perturbation theory, the shift Δω of the frequency of the mode is given by 10,12 Δω = À Δn n ω 0 AEE 0 jE 0 ae V (8) where the scalar product of the field is restricted to the volume V of perturbation. Equation 8 is equivalent to eq 2.…”

Section: Methodsmentioning

confidence: 99%

“…The formal solution of eq 9 has the form of |Eae = |E 0 ae þ (iωμc 2 /ε)G 0 Q |Jae, where |E 0 ae is the solution of the homogeneous problem and G 0 its Green's dyadic function. Using a procedure equivalent to the one in a previous work (Supporting Information in Gallinet et al 29 ), the electric field wave function can be written as QM QjEae ¼ ω 2 0 jE 0 ae ( ic 2 μω 2ε AEE 0 jJaejE 0 ae (10) where the sign of the second term is chosen with respect to causality. Let us now assume that the current field is governed by Ohm's law (|Jae = σ|Eae with σ the conductivity of the material) and restricted to a region C corresponding to the presence of a conductive material.…”

Section: Methodsmentioning

confidence: 99%

“…Equivalents of eq 2 have been derived using perturbation theory. 10,12 Its derivation is shown for completeness in the Methods section. Equation 2, which is valid for both radiative and subradiant modes, implies that the frequency shift of the mode is linear with respect to the refractive index perturbation.…”

Section: Articlementioning

confidence: 99%

“…5,9 From the optical point of view, a shift of the resonance frequency of a plasmonic resonator occurs when the dielectric properties of the local environment change upon binding of any analyte under study. 10 Both the sensitivity of the plasmonic mode and the uncertainty in the determination of its resonance frequency determine the detection limit. 11,12 Plasmonic modes with a long radiative lifetime, subradiant modes, possess a strong spectral dispersion which further improves the limit of detection and makes them very attractive for sensing applications.…”

mentioning

confidence: 99%

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Refractive Index Sensing with Subradiant Modes: A Framework To Reduce Losses in Plasmonic Nanostructures

Gallinet

Martin

2013

ACS Nano

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Plasmonic modes with long radiative lifetimes, subradiant modes, combine strong confinement of the electromagnetic energy at the nanoscale with a steep spectral dispersion, which makes them promising for biochemical sensors or immunoassays. Subradiant modes have three decay channels: Ohmic losses, their extrinsic coupling to radiation, and possibly their intrinsic dipole moment. In this work, the performance of subradiant modes for refractive index sensing is studied with a general analytical and numerical approach. We introduce a model for the impact that has different decay channels of subradiant modes on the spectral resolution and contrast. It is shown analytically and verified numerically that there exists an optimal

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Articlementioning

confidence: 99%

mentioning

confidence: 99%

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Refractive Index Sensing with Subradiant Modes: A Framework To Reduce Losses in Plasmonic Nanostructures

Gallinet

Martin

2013

ACS Nano

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“…This structure is made of periodic dielectric materials in micron scale. PhC demonstrates unique optical properties, where the most interesting one is having adjustable photonic band gap [1,2]. On the other hand, slow light phenomenon that can be attained in PhC waveguides is known as a suitable approach to increase light-matter interactions [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

All-optical switching using a new photonic crystal directional coupler

Vakili

Bahadori-Haghighi

Ghayour

2015

AEM

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In this paper all-optical switching in a new photonic crystal directional coupler is performed. The structure of the switch consists of a directional coupler and a separate path for a control signal called "control waveguide". In contrast to the former reported structures in which the directional couplers are made by removing a row of rods entirely, the directional coupler in our optical switch is constructed by two reduced-radius line-defect waveguides separated by the control waveguide. Furthermore, in our case the background material has the nonlinear Kerr property. Therefore, in the structure of this work, no frequency overlap occurs between the control waveguide mode and the directional coupler modes. It is shown that such a condition provides a very good isolation between the control and the probe signals at the output ports. In the control waveguide, nonlinear Kerr effect causes the required refractive index change by the presence of a high power control (pump) signal. Even and odd modes of the coupler are investigated by applying the distribution of the refractive index change in the nonlinear region of a super-cell so that a switching length of about 94 µm is obtained at the wavelength of 1.55 µ m. Finally, alloptical switching of the 1.55 µm probe signal using a control signal at the wavelength of 1.3 µm, is simulated through the finite-difference time-domain method, where both signals are desirable in optical communication systems. A very high extinction ratio of 67 dB is achieved and the temporal characteristics of the switch are demonstrated.

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Subwavelength Plasmonic Two‐Conductor Waveguides

Mahigir

Dastmalchi

Veronis

et al. 2016

Wiley Encyclopedia of Electrical and Electronics Engineering

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This article reviews advances in the development of subwavelength plasmonic two‐conductor waveguides. First, the properties of two‐dimensional (2D) plasmonic two‐conductor waveguides, which are commonly referred to as metal–dielectric–metal (MDM) waveguides, are discussed. This is followed by a review of the properties of three‐dimensional (3D) plasmonic two‐conductor waveguides, such as plasmonic slot waveguides and plasmonic coaxial waveguides. Following the discussion of plasmonic two‐conductor waveguiding geometries, the properties of components based on these waveguides are reviewed. More specifically, we focus on bends and splitters that are essential components of optical integrated circuits. The properties of such bends and splitters in 2D and 3D plasmonic two‐conductor waveguides are discussed. Finally, the fabrication and optical characterization methods for 2D and 3D plasmonic two‐conductor waveguides are presented.

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Novelties of Light with Photonic Crystals

Cited by 353 publications

References 23 publications

Refractive Index Sensing with Subradiant Modes: A Framework To Reduce Losses in Plasmonic Nanostructures

Refractive Index Sensing with Subradiant Modes: A Framework To Reduce Losses in Plasmonic Nanostructures

All-optical switching using a new photonic crystal directional coupler

Subwavelength Plasmonic Two‐Conductor Waveguides

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