Journal ArticleDOI
A new variational method of incorporating loss in the analysis of coupled multiple-quantum well three-dimensional waveguides
A. Bandyopadhyay,P.K. Basu +1 more
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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. >read more
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Correction to «normal mode analysis of waveguide devices. I: Theory» and «normal mode analysis of waveguide devices. II: Device output and crosstalk»
TL;DR: In this article, a correction d'erreur dans light wave technologie, vol. 6, pp. 1051-1057, 1988, is presented.
References
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Journal ArticleDOI
Electric field dependence of optical absorption near the band gap of quantum-well structures.
David A. B. Miller,Daniel S. Chemla,T. C. Damen,Arthur C. Gossard,W. Wiegmann,Thomas H. Wood,Charles A. Burrus +6 more
TL;DR: Detailed calculations of the shift of exciton peaks are presented including (i) exact solutions for single particles in infinite wells, (ii) tunneling resonance calculations for finite wells, and (iii) variational calculations ofexciton binding energy in a field.
Journal ArticleDOI
Dielectric rectangular waveguide and directional coupler for integrated optics
TL;DR: In this paper, the authors studied the transmission properties of a guide consisting of a dielectric rod with rectangular cross section, surrounded by several dielectrics of smaller refractive indices.
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A circular-harmonic computer analysis of rectangular dielectric waveguides
TL;DR: In this article, a computer analysis of the propagating modes of a rectangular dielectric waveguide is presented, based on an expansion of the electromagnetic field in terms of a series of circular harmonics multiplied by trigonometric functions.
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Improved coupled-mode equations for dielectric guides
TL;DR: In this paper, an improved coupled-mode equation for parallel dielectric waveguides was derived by using a newly found relationship that connects the propagation constants of the individual guides to the coupling coefficients via an overlap integral that measures the guides' proximity.
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Numerical analysis of planar optical waveguides using matrix approach
TL;DR: In this article, a simple matrix method for obtaining propagation characteristics, including losses for various modes of an arbitrarily graded planar waveguide structure which may have media of complex refractive indices, is presented.