A new variational method of incorporating loss in the analysis of coupled multiple-quantum well three-dimensional waveguides
TL;DR: In this paper, a simple method of calculating the imaginary part of the propagation constant in a lossy waveguide that closely follows the effective index method of finding the real propagation constant of a rectangular dielectric guide was developed.
Abstract: We have developed a simple method of calculating the imaginary part of the propagation constant in a lossy waveguide that closely follows the effective-index method of finding the real propagation constant of a rectangular dielectric guide. The method gives values much in agreement with the exact values obtained by the circular-harmonics method. The method has been used in the improved coupled-mode analysis of coupled-multiple-quantum-well waveguides developed by Tsang and Chuang. Three different configurations of coupled waveguides have been considered: slab, buried-channel, and strip-loaded waveguide directional couplers, where excitonic electrorefraction in multiquantum wells has been utilized to accomplish the switching. The output power-electric field curves calculated by using the above method agree closely in all three cases with similar curves obtained by using a complex propagation constant calculated by a numerical two-dimensional root-searching technique. The present method simplifies the design and optimization of coupled-waveguide devices and its application is illustrated in the case of multiple-quantum-well directional couplers. >
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Journal Article•
TL;DR: In this article, a correction d'erreur dans light wave technologie, vol. 6, pp. 1051-1057, 1988, is presented.
Abstract: Correction d'erreur dans Light wave Technologie, vol. 6, pp. 1051-1057, 1988. Correction d'erreur dans light wave technologie, vol. 6, pp. 1058-1068, 1988
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TL;DR: In this paper, an efficient numerical method for accurately determining the real and/or complex propagation constants of guided modes and leaky waves in general multilayer waveguides is presented.
Abstract: An efficient numerical method for accurately determining the real and/or complex propagation constants of guided modes and leaky waves in general multilayer waveguides is presented. The method is applicable to any lossless and/or lossy (dielectric, semiconductor, metallic) waveguide structure. The method is based on the argument principle theorem and is capable of extracting all of the zeros of any analytic function in the complex plane. It is applied to solving the multilayer waveguide dispersion equation derived from the well known thin-film transfer matrix theory. Excellent agreement is found with seven previously published results and with results from two limiting cases where the propagating constants can be obtained analytically. >
185 citations
TL;DR: In this article, an algorithm for the calculation of the propagation constant of integrated-optics waveguides is developed, which allows the additional determination of the field distribution, and all parameters necessary for heterostructure laser development can be calculated.
Abstract: An algorithm for the calculation of the propagation constant of integrated-optics waveguides is developed. The waveguide may consist of any number of layers with complex refractive indexes due to gain and loss. It allows the additional determination of the field distribution. Thus, all parameters necessary for heterostructure laser development can be calculated. The resulting program was run on a personal computer; numerical results are presented. >
156 citations
TL;DR: In this article, the first observation of the quantum constrained Stark effect in InGaAs/InP multiple quantum wells grown by organometallic vapor phase epitaxy was reported, both in transmission and photoconductivity measurements.
Abstract: We report the first observation of the quantum‐confined Stark effect in InGaAs/InP multiple quantum wells grown by organometallic vapor phase epitaxy. The effect is observed both in transmission and photoconductivity measurements. The observed spectral shift agrees with the theory.
132 citations
TL;DR: In this paper, the authors discuss TE and TM mode directional couplers made of nonidentical asymmetric slab waveguides and provide approximate expressions for the coupling coefficients of synchronous (no grating) coupler and their accuracy is checked by comparison with exact solutions that are based on solving the guided mode problem.
Abstract: We discuss TE and TM mode directional couplers made of nonidentical asymmetric slab waveguides. Approximate expressions are provided for the coupling coefficients of synchronous (no grating) couplers and their accuracy is checked by comparison with exact solutions that are based on solving the guided mode problem of the total structure consisting of the two slabs considered to be a single waveguide.
103 citations
TL;DR: In this paper, the authors demonstrate that large quantum-confined Stark effect can be obtained in high quality InGaAsP/InP quantum well p−i−n heterostructures.
Abstract: We demonstrate for the first time that large quantum‐confined Stark effect can be obtained in high quality InGaAsP/InP quantum well p‐i‐n heterostructures. The compositional flexibility of this material system is particularly suited for quantum well device applications in optical communications systems operating between 1.55 and 1.3 μm. We measure the magnitude of the shift of the ground‐state exciton transition with applied electric field and find that it is significantly enhanced over ternary wells. We have also determined the electro‐optic intensity and phase modulation response in these structures.
102 citations