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Modal transmission line theory of op...

Ho, Kwang-Chun.

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Modal transmission line theory of optical planar guiding structures.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Modal transmission line theory of optical planar guiding structures./
Author:	Ho, Kwang-Chun.
Description:	122 p.
Notes:	Source: Dissertation Abstracts International, Volume: 57-11, Section: B, page: 7125.
Contained By:	Dissertation Abstracts International57-11B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9711851
ISBN:	9780591193909

Modal transmission line theory of optical planar guiding structures.
Ho, Kwang-Chun.

Modal transmission line theory of optical planar guiding structures. - 122 p.

Source: Dissertation Abstracts International, Volume: 57-11, Section: B, page: 7125.

Thesis (Ph.D.)--Polytechnic University, 1997.

This dissertation takes advantage of a rigorous modal transmission-line theory developed by Tamir and Zhang (1) to study the scattering and guidance of electromagnetic waves by multilayered grating configurations. This approach brings considerable physical insight into the grating diffraction process and facilitates the derivation of the fields everywhere. In particular, the transmission-line representation can serve as a template for computational algorithms that systematically evaluate dispersion properties, radiation effects, wave coupling and other characteristics that are not readily obtained by other methods.

ISBN: 9780591193909Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Modal transmission line theory of optical planar guiding structures.
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020 $a 9780591193909
035 $a (UnM)AAI9711851
035 $a AAI9711851
040 $a UnM $c UnM
100 1 $a Ho, Kwang-Chun. $3 1913774
245 1 0 $a Modal transmission line theory of optical planar guiding structures.
300 $a 122 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-11, Section: B, page: 7125.
500 $a Co-Advisers: G. Griffel; T. Tamir.
502 $a Thesis (Ph.D.)--Polytechnic University, 1997.
520 $a This dissertation takes advantage of a rigorous modal transmission-line theory developed by Tamir and Zhang (1) to study the scattering and guidance of electromagnetic waves by multilayered grating configurations. This approach brings considerable physical insight into the grating diffraction process and facilitates the derivation of the fields everywhere. In particular, the transmission-line representation can serve as a template for computational algorithms that systematically evaluate dispersion properties, radiation effects, wave coupling and other characteristics that are not readily obtained by other methods.
520 $a By using these techniques, a rigorous transmission-line approach for analyzing TE-TM mode (polarization) splitting by means of directional couplers is presented. This approach can be applied to situations involving either lossy or gainy materials such as GaAs/AlGaAs multi-quantum wells (MQW) structure. The results reveal that, due to modal birefringence, maximum polarization discriminations is achieved at an optimal length $ of the coupler that is different from the polarization length $ predicted by conventional coupled-mode methods. A criterion to evaluate the optimal length $ is developed, and the intensity distribution (far-field radiation pattern) of the desired output beams is obtained. In addition, we evaluate the resonance modes of vertical-cavity surface-emitting lasers by using Floquet's theorem and the bisection principle of transmission-line networks.
520 $a Novel field orthogonality conditions and other characteristics of TE and TM modes in multilayered periodic structures are also derived from the modal transmission-line theory. For the case of a symmetrical grating structure with finite length, the results reveal that the equivalent network in the Bragg regime is dominated by the imaginary component of the characteristic impedance which thus acts as a stop-band optical filter. Finally, the field orthogonality condition and power normalization in symmetric planes of multilayered grating structures are utilized to analyze maximum power transfer in grating-assisted couplers containing an active layer. By defining a coupling efficiency $\ eta $ between input and output powers, the power exchange between two guiding channels is also explored. This power exchange is maximized at a grating period $\ Lambda\sb{min} $ rather than the value $\ Lambda\sb{ph} $ defined by a phase-match condition.
590 $a School code: 0179.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Optics. $3 1018756
650 4 $a Physics, Radiation. $3 1019212
690 $a 0544
690 $a 0752
690 $a 0756
710 2 0 $a Polytechnic University. $3 1249856
773 0 $t Dissertation Abstracts International $g 57-11B.
790 1 0 $a Griffel, G., $e advisor
790 1 0 $a Tamir, T., $e advisor
790 $a 0179
791 $a Ph.D.
792 $a 1997
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9711851