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Two-dimensional photonic crystal def...

Lee, Po-Tsung.

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Two-dimensional photonic crystal defect lasers on a thin dielectric slab.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Two-dimensional photonic crystal defect lasers on a thin dielectric slab./
Author:	Lee, Po-Tsung.
Description:	144 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4528.
Contained By:	Dissertation Abstracts International64-09B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3103931

Two-dimensional photonic crystal defect lasers on a thin dielectric slab.
Lee, Po-Tsung.

Two-dimensional photonic crystal defect lasers on a thin dielectric slab. - 144 p.

Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4528.

Thesis (Ph.D.)--University of Southern California, 2003.

Optical devices based on photonic crystals offer great potential for the future high-density integration of photonic circuits. Photonic crystal defect lasers are very attractive light sources in optical communication systems and integrated optical circuits. This thesis focuses on the design, fabrication, and characterization of two-dimensional photonic crystal defect lasers on a free-standing InGaAsP slab emitting near the 1.55 mum communication wavelength. The three-dimensional confinement of electromagnetic fields is achieved using a two-dimensional photonic crystal embedded in a half-wavelength thick dielectric waveguide. The resonant cavity is formed by removing 19 air holes from a triangular lattice and is about 2.4&sim;2.6 mum across. The fabrication process includes electron beam lithography to define the patterns, reactive ion etching and electron cyclotron resonance etching to transfer the patterns, and a final HCl selective wet etching of InP to form the V-shaped undercut groove. Optically-pumped pulsed lasing at and above room temperature is demonstrated. The 0.5 mW threshold pump power obtained is 20 times smaller than previous photonic crystal lasers with similar size resonant cavities and pump spot. The defect lasers also operate under longer pulses and larger duty cycles than other similar air suspended membrane structures. Operation of photonic crystal defect lasers for substrate temperatures as high as 50°C is reported for the first time. The temperature dependence of the lasing wavelength and the threshold pump power is measured. The optical losses in photonic crystal laser cavities are investigated by experimentally varying the number of lattice periods across a photonic crystal laser array. The estimated cavity quality factor increases with increasing number of lattice periods up to 11 periods. This result indicates that residual scattering loss from imperfections in the lattice is relatively small and surface recombination will be a limiting factor when fabricating very low-threshold photonic crystal defect lasers. A two-dimensional multi-wavelength photonic crystal laser array formed by lithographically varying the lattice constants of individual elements with wavelength spacing between adjacent lasers of 4.6 nm on average is achieved.Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Two-dimensional photonic crystal defect lasers on a thin dielectric slab.
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035 $a (UnM)AAI3103931
035 $a AAI3103931
040 $a UnM $c UnM
100 1 $a Lee, Po-Tsung. $3 1953927
245 1 0 $a Two-dimensional photonic crystal defect lasers on a thin dielectric slab.
300 $a 144 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4528.
500 $a Adviser: John D. O'Brien.
502 $a Thesis (Ph.D.)--University of Southern California, 2003.
520 $a Optical devices based on photonic crystals offer great potential for the future high-density integration of photonic circuits. Photonic crystal defect lasers are very attractive light sources in optical communication systems and integrated optical circuits. This thesis focuses on the design, fabrication, and characterization of two-dimensional photonic crystal defect lasers on a free-standing InGaAsP slab emitting near the 1.55 mum communication wavelength. The three-dimensional confinement of electromagnetic fields is achieved using a two-dimensional photonic crystal embedded in a half-wavelength thick dielectric waveguide. The resonant cavity is formed by removing 19 air holes from a triangular lattice and is about 2.4&sim;2.6 mum across. The fabrication process includes electron beam lithography to define the patterns, reactive ion etching and electron cyclotron resonance etching to transfer the patterns, and a final HCl selective wet etching of InP to form the V-shaped undercut groove. Optically-pumped pulsed lasing at and above room temperature is demonstrated. The 0.5 mW threshold pump power obtained is 20 times smaller than previous photonic crystal lasers with similar size resonant cavities and pump spot. The defect lasers also operate under longer pulses and larger duty cycles than other similar air suspended membrane structures. Operation of photonic crystal defect lasers for substrate temperatures as high as 50°C is reported for the first time. The temperature dependence of the lasing wavelength and the threshold pump power is measured. The optical losses in photonic crystal laser cavities are investigated by experimentally varying the number of lattice periods across a photonic crystal laser array. The estimated cavity quality factor increases with increasing number of lattice periods up to 11 periods. This result indicates that residual scattering loss from imperfections in the lattice is relatively small and surface recombination will be a limiting factor when fabricating very low-threshold photonic crystal defect lasers. A two-dimensional multi-wavelength photonic crystal laser array formed by lithographically varying the lattice constants of individual elements with wavelength spacing between adjacent lasers of 4.6 nm on average is achieved.
590 $a School code: 0208.
650 4 $a Engineering, Electronics and Electrical. $3 626636
690 $a 0544
710 2 0 $a University of Southern California. $3 700129
773 0 $t Dissertation Abstracts International $g 64-09B.
790 1 0 $a O'Brien, John D., $e advisor
790 $a 0208
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3103931