Model for reflection and transmission matrices of nanowire end facets

Svendsen, Guro K.; Weman, H.; Skaar, Johannes

doi:10.1063/1.3583496

Cited by 10 publications

(18 citation statements)

References 27 publications

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“…Svendsen et al reached similar conclusions after applying a semianalytical approach based on reflection matrices to both wide bandgap materials and GaAs/AlGaAs core/shell nanowires [93]. Wang et al made a complete investigation into the reflectance and quality factor of the resonant modes as a function of the radius and length of a propagating modes versus diameter in infinite cylindrical nanowires for different semiconducting materials, with respect to their emission wavelength.…”

Section: (A) Waveguiding Mechanism and Bare Resonatorsmentioning

confidence: 73%

Nanowire Lasers

et al. 2015

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Abstract:We review principles and trends in the use of semiconductor nanowires as gain media for stimulated emission and lasing. Semiconductor nanowires have recently been widely studied for use in integrated optoelectronic devices, such as light-emitting diodes (LEDs), solar cells, and transistors. Intensive research has also been conducted in the use of nanowires for subwavelength laser systems that take advantage of their quasione-dimensional (1D) nature, flexibility in material choice and combination, and intrinsic optoelectronic properties. First, we provide an overview on using quasi-1D nanowire systems to realize subwavelength lasers with efficient, directional, and low-threshold emission. We then describe the state of the art for nanowire lasers in terms of materials, geometry, and wavelength tunability. Next, we present the basics of lasing in semiconductor nanowires, define the key parameters for stimulated emission, and introduce the properties of nanowires. We then review advanced nanowire laser designs from the literature. Finally, we present interesting perspectives for low-threshold nanoscale light sources and optical interconnects. We intend to illustrate the potential of nanolasers in many applications, such as nanophotonic devices that integrate electronics and photonics for next-generation optoelectronic devices. For instance, these building blocks for nanoscale photonics can be used for data storage and biomedical applications when coupled to on-chip characterization tools. These nanoscale monochromatic laser light sources promise breakthroughs in nanophotonics, as they can operate at room temperature, can potentially be electrically driven, and can yield a better understanding of intrinsic nanomaterial properties and surface-state effects in lowdimensional semiconductor systems.

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Section: (A) Waveguiding Mechanism and Bare Resonatorsmentioning

confidence: 73%

Nanowire Lasers

et al. 2015

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“…With the demand for device miniaturization, coupling to and from evanescent modes becomes increasingly important. For instance, when considering the end-facet reflection and transmission of nanowire lasers, or the reflection and transmission of nanowire Bragg reflectors, the evanescent waveguide modes play an important role [6,7]. For certain metal-dielectric waveguides, there are modes with complex propagation constants [8,9], even though the material is lossless.…”

Section: Introductionmentioning

confidence: 99%

Reciprocity and the scattering matrix of waveguide modes

2013

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The implications of the Lorentz reciprocity theorem for a scatterer connected to waveguides with arbitrary modes, including degenerate, evanescent, and complex modes, are discussed. In general it turns out that a matrix CS is symmetric, where C is the matrix of generalized orthogonality coefficients, and S is the scattering matrix. Examples are given, including a scatterer surrounded by waveguides or free space, and discontinuities of waveguides.

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“…The refractive index contrast between the semiconductor nanowire and its surroundings is typically very large; the simplest nanowire-laser designs could thus use the cleaved end facets as reflectors. With such designs, the reflectivity of the guided lasing mode is quite moderate for single mode semiconductor nanowire lasers (∼ 25% for GaAsbased nanowire, ∼ 18% for ZnO based) [4][5][6] . Bragg gratings have been proposed to obtain a higher end facet reflectivity.…”

Section: Introductionmentioning

confidence: 99%

Investigations of Bragg reflectors in nanowire lasers

Svendsen¹,

Weman²,

Skaar³

2012

Journal of Applied Physics

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The reflectivity of various Bragg reflectors in connection to waveguide structures, including nanowires, has been investigated using modal reflection and transmission matrices. A semi-analytical model was applied yielding increased understanding of the diffraction effects present in such gratings. Planar waveguides and nanowire lasers are considered in particular. Two geometries are compared; Bragg reflectors within the waveguides are shown to have significant advantages compared to Bragg reflectors in the substrate, when diffraction effects are significant

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Model for reflection and transmission matrices of nanowire end facets

Cited by 10 publications

References 27 publications

Nanowire Lasers

Nanowire Lasers

Reciprocity and the scattering matrix of waveguide modes

Investigations of Bragg reflectors in nanowire lasers

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