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Artificially birefringent aluminum g...

Scaccabarozzi, Luigi.

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Artificially birefringent aluminum gallium arsenide/aluminum oxide-based submicron waveguides and resonant cavities for nonlinear optics.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Artificially birefringent aluminum gallium arsenide/aluminum oxide-based submicron waveguides and resonant cavities for nonlinear optics./
Author:	Scaccabarozzi, Luigi.
Description:	159 p.
Notes:	Adviser: James S. Harris.
Contained By:	Dissertation Abstracts International67-05B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3219372
ISBN:	9780542708060

Artificially birefringent aluminum gallium arsenide/aluminum oxide-based submicron waveguides and resonant cavities for nonlinear optics.
Scaccabarozzi, Luigi.

Artificially birefringent aluminum gallium arsenide/aluminum oxide-based submicron waveguides and resonant cavities for nonlinear optics. - 159 p.

Adviser: James S. Harris.

Thesis (Ph.D.)--Stanford University, 2006.

Artificial birefringence in weakly-confining AlGaAs/AlOx waveguides has been already demonstrated; however, the conversion efficiency remained low, due to poor lateral confinement.

ISBN: 9780542708060Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Artificially birefringent aluminum gallium arsenide/aluminum oxide-based submicron waveguides and resonant cavities for nonlinear optics.
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020 $a 9780542708060
035 $a (UMI)AAI3219372
035 $a AAI3219372
040 $a UMI $c UMI
100 1 $a Scaccabarozzi, Luigi. $3 1296567
245 1 0 $a Artificially birefringent aluminum gallium arsenide/aluminum oxide-based submicron waveguides and resonant cavities for nonlinear optics.
300 $a 159 p.
500 $a Adviser: James S. Harris.
500 $a Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2636.
502 $a Thesis (Ph.D.)--Stanford University, 2006.
520 $a Artificial birefringence in weakly-confining AlGaAs/AlOx waveguides has been already demonstrated; however, the conversion efficiency remained low, due to poor lateral confinement.
520 $a In fiber optics systems there is an increasing need for fast, compact switches. Currently employed opto-electro-optical converters are relatively slow and power demanding. Nonlinear optical devices, such as lithium niobate (LiNbO3) waveguides, can provide fast, all-optical wavelength conversion. However, they require centimeter-long interaction length and integration with active devices is difficult, since they are not semiconductors.
520 $a GaAs has a nonlinear coefficient four times larger than LiNbO3 and a well-established fabrication technology. Moreover, passive and active devices could be potentially integrated to realize on-chip photonic circuits. Gallium arsenide quasi-phasematched (QPM) waveguides have also been demonstrated and although the required interaction length is smaller (millimeters), they require a complex fabrication process.
520 $a In this work we present the design, fabrication and characterization of tightly-confining aluminum gallium arsenide (AlGaAs)/aluminum oxide (AlOx) nonlinear waveguide devices. Because of the high index contrast of the AlGaAs/AlOx material system, phasematching can be achieved by artificial birefringence. This approach greatly simplifies the fabrication process.
520 $a We employed the AlGaAs/AlOx material system to achieve both birefringent phasematching and sub-micron confinement. The normalized conversion efficiency is larger than 20,000 %/W/cm2. This value is 10x higher than previously reported works. We developed a new fabrication process to realize high aspect-ratio, extremely smooth waveguides, which are characterized by very low propagation loss (&sim;2 dB/mm) at the fundamental wavelength.
520 $a Moreover, we showed that nonlinear effects can be further enhanced using a cavity embedded in the waveguide, resonant at the fundamental wavelength. For this purpose a novel dichroic mirror, highly reflective at the fundamental wavelength but with high transmission at the second harmonic, was designed and fabricated. Using these mirrors, we demonstrated for the first time enhanced second harmonic generation in resonant, collinear waveguide devices.
520 $a In conclusion, we demonstrated tightly-confining, birefringently phasematched waveguides and resonant cavities with the highest normalized conversion efficiency ever reported. Furthermore, we designed and fabricated the first dichroic mirror for tightly-confining waveguides. Cavities realized with these mirrors achieved large resonant enhancement of second harmonic generation.
590 $a School code: 0212.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Electricity and Magnetism. $3 1019535
650 4 $a Physics, Optics. $3 1018756
690 $a 0544
690 $a 0607
690 $a 0752
710 2 0 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 67-05B.
790 $a 0212
790 1 0 $a Harris, James S., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3219372