Resonant grating waveguide structures

Rosenblatt, D.; Sharon, André; Friesem, Asher A.

doi:10.1109/3.641320

Cited by 610 publications

(363 citation statements)

References 16 publications

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“…This leaky mode interacts with the zeroth-order waves and in theory results in complete reflection and zero transmission for plane incident wave and infinite gratings [50]. In practice, there will be a certain amount of transmission at resonance depending on the coupling strength of the gratings.…”

Section: Wavelength Selective Mirrorsmentioning

confidence: 99%

“…This should be feasible if parameters of the grating and the waveguide were designed to enforce lateral confinement of the light within the set-up and to control the spectral bandwidth and angular width of the beam. The structures have been materialized and termed "grating waveguide structures" (GWS) [50], "sub--wavelength resonant gratings" (SRG) [51] or "resonant grating mirror" [52]. A ray picture model applicable to high finesse structures of this type is displayed in Fig.…”

Section: Wavelength Selective Mirrorsmentioning

confidence: 99%

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External cavity wavelength tunable semiconductor lasers - a review

Mroziewicz

2008

Opto-Electronics Review

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External cavity tunable lasers have been around for many years and now constitute a large group of semiconductor lasers featuring very unique properties. The present review has been restricted to the systems based on the edge emitting diode lasers set-up in a hybrid configuration. The aim was to make the paper as concise as possible without sacrificing, however, most important details. We start with short description of the fundamentals essential for operation of the external cavity lasers to set the stage for explanation of their properties and some typical designs. Then, semiconductor optical amplifiers used in the external cavity lasers are highlighted more in detail as well as diffraction gratings and other types of wavelength-selective reflectors used to provide optical feedback in these lasers. This is followed by a survey of designs and properties of various external cavity lasers both with mobile bulk gratings and with fixed wavelength selective mirrors. The paper closes with description of some recent developments in the field to show prospects for further progress directed towards miniaturization and integration of the external cavity laser components used so far to set-up hybrid systems.

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Section: Wavelength Selective Mirrorsmentioning

confidence: 99%

Section: Wavelength Selective Mirrorsmentioning

confidence: 99%

External cavity wavelength tunable semiconductor lasers - a review

Mroziewicz

2008

Opto-Electronics Review

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“…Red and blue curves are Gaussian fits of raw data in forward (black) and backward (green) directions, respectively [68]. diffraction in Littrow [76]: first, the incident laser beam is evanescently coupled into the fundamental TE mode of the composite waveguide; then, the reverse-going waveguide mode is generated by grating reflection and subsequently evanescently coupled out to air ( Figure 4C). Thus, measuring the diffraction efficiency, defined as |E dif /E inc | 2 , for left and right incident light provides a proxy probe of the forward-and backward-going modal reflectivity within the waveguide.…”

Section: Unidirectional Reflectionless Propagation In Pt-symmetric Symentioning

confidence: 99%

Unidirectional reflectionless light propagation at exceptional points

et al. 2017

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Abstract:In this paper, we provide a comprehensive review of unidirectional reflectionless light propagation in photonic devices at exceptional points (EPs). EPs, which are branch point singularities of the spectrum, associated with the coalescence of both eigenvalues and corresponding eigenstates, lead to interesting phenomena, such as level repulsion and crossing, bifurcation, chaos, and phase transitions in open quantum systems described by non-Hermitian Hamiltonians. Recently, it was shown that judiciously designed photonic synthetic matters could mimic the complex non-Hermitian Hamiltonians in quantum mechanics and realize unidirectional reflection at optical EPs. Unidirectional reflectionlessness is of great interest for optical invisibility. Achieving unidirectional reflectionless light propagation could also be potentially important for developing optical devices, such as optical network analyzers. Here, we discuss unidirectional reflectionlessness at EPs in both parity-time (PT)-symmetric and non-PT-symmetric optical systems. We also provide an outlook on possible future directions in this field.

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“…The multiperiodic structures are two basic examples, one disjunction of two and one of three different monoperiodic gratings, following the approach of Kluge et al (2014). The periodicities of 250, 300, and 350 nm were chosen to show distinctive resonances in the We expect the two multiperiodic structures to show two and three main resonance features in the transmission spectrum at normal incidence as follows from Bragg theory (Rosenblatt et al 1997):…”

Section: Structures Under Investigationmentioning

confidence: 99%

“…Grating waveguides have been studied throughout the last decades and show high potential for integrated sensing applications (Rosenblatt et al 1997;Threm et al 2012). They have been studied for label-free biosensing (Cunningham et al 2015;Jahns et al 2015;Nazirizadeh et al 2016), to increase the light outcoupling from organic light-emitting diodes (Kluge et al 2014) and to improve the efficiency of solar cells (Zeng et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Simulation methods for multiperiodic and aperiodic nanostructured dielectric waveguides

et al. 2017

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Nanostructured dielectric waveguides are of high interest for biosensing applications, light emitting devices as well as solar cells. Multiperiodic and aperiodic nanostructures allow for custom-designed spectral properties as well as near-field characteristics with localized modes. Here, a comparison of experimental results and simulation results obtained with three different simulation methods is presented. We fabricated and characterized multiperiodic nanostructured dielectric waveguides with two and three compound periods as well as deterministic aperiodic nanostructured waveguides based on Rudin-Shapiro, Fibonacci, and Thue-Morse binary sequences. The near-field and far-field properties are computed employing the finite-element method (FEM), the finite-difference time-domain (FDTD) method as well as a rigorous coupled wave algorithm (RCWA). The results show that all three methods are suitable for the simulation of the above mentioned structures. Only small computational differences are obtained in the near fields and transmission characteristics. For the compound multiperiodic structures the simulations correctly predict the general shape of the experimental transmission spectra with number and magnitude of transmission dips. For the aperiodic nanostructures the agreement between simulations and measurements decreases, which we attribute to imperfect fabrication at smaller feature sizes.

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Resonant grating waveguide structures

Cited by 610 publications

References 16 publications

External cavity wavelength tunable semiconductor lasers - a review

External cavity wavelength tunable semiconductor lasers - a review

Unidirectional reflectionless light propagation at exceptional points

Simulation methods for multiperiodic and aperiodic nanostructured dielectric waveguides

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