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Author: Daniel Arthur Haeger
Publisher:
ISBN: 9781303872532
Category :
Languages : en
Pages : 216
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Book Description
Electrically injected semipolar (202 1) laser diodes grown on a relaxed AlGaN buffer layers are demonstrated. The lasing wavelength was 384 nm. Reduction in the lasing wavelength was not achieved due to the challenges previously mentioned.
Author: Daniel Arthur Haeger
Publisher:
ISBN: 9781303872532
Category :
Languages : en
Pages : 216
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Book Description
Electrically injected semipolar (202 1) laser diodes grown on a relaxed AlGaN buffer layers are demonstrated. The lasing wavelength was 384 nm. Reduction in the lasing wavelength was not achieved due to the challenges previously mentioned.
Author: Wolfgang G. Scheibenzuber
Publisher: Springer Science & Business Media
ISBN: 3642245382
Category : Science
Languages : en
Pages : 107
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Book Description
The emergence of highly efficient short-wavelength laser diodes based on the III-V compound semiconductor GaN has not only enabled high-density optical data storage, but is also expected to revolutionize display applications. Moreover, a variety of scientific applications in biophotonics, materials research and quantum optics can benefit from these versatile and cost-efficient laser light sources in the near-UV to green spectral range. This thesis describes the device physics of GaN-based laser diodes, together with recent efforts to achieve longer emission wavelengths and short-pulse emission. Experimental and theoretical approaches are employed to address the individual device properties and optimize the laser diodes toward the requirements of specific applications.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
We present the results of a three year LDRD project that has focused on overcoming major materials roadblocks to achieving AlGaN-based deep-UV laser diodes. We describe our growth approach to achieving AlGaN templates with greater than ten times reduction of threading dislocations which resulted in greater than seven times enhancement of AlGaN quantum well photoluminescence and 15 times increase in electroluminescence from LED test structures. We describe the application of deep-level optical spectroscopy to AlGaN epilayers to quantify deep level energies and densities and further correlate defect properties with AlGaN luminescence efficiency. We further review our development of p-type short period superlattice structures as an approach to mitigate the high acceptor activation energies in AlGaN alloys. Finally, we describe our laser diode fabrication process, highlighting the development of highly vertical and smooth etched laser facets, as well as characterization of resulting laser heterostructures.
Author: Hans Zappe
Publisher: Springer Science & Business Media
ISBN: 3662082497
Category : Technology & Engineering
Languages : en
Pages : 349
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Book Description
Laser Diode Microsystems provides the reader with the basic knowledge and understanding required for using semiconductor laser diodes in optical microsystems and micro-optical electromechanic systems. This tutorial addresses the fundamentals of semiconductor laser operation and design, coupled with an overview of the types of laser diodes suitable for use in Microsystems, along with their distinguishing characteristics. Emphasis is placed on laser diode characterization and measurement as well as the assembly techniques and optical accessories required for incorporation of semiconductor lasers into complex microsystems. Equipped with typical results and calculation examples, this hand-on text helps readers to develop a feel for how to choose a laser diode, characterize it and incorporate it into a microsystem.
Author: Michael Kneissl
Publisher: Springer
ISBN: 3319241001
Category : Technology & Engineering
Languages : en
Pages : 454
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Book Description
This book provides a comprehensive overview of the state-of-the-art in group III-nitride based ultraviolet LED and laser technologies, covering different substrate approaches, a review of optical, electronic and structural properties of InAlGaN materials as well as various optoelectronic components. In addition, the book gives an overview of a number of key application areas for UV emitters and detectors, including water purification, phototherapy, sensing, and UV curing. The book is written for researchers and graduate level students in the area of semiconductor materials, optoelectronics and devices as well as developers and engineers in the various application fields of UV emitters and detectors.
Author: Shuji Nakamura
Publisher: Springer Science & Business Media
ISBN: 3662041561
Category : Science
Languages : en
Pages : 373
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Book Description
From the reviews of the first edition: "The technical chapters will be lapped up by semiconductor specialists keen to know more [...] the book includes fascinating material that answers the question: why did Nakamura succeed where many, much larger, research groups failed." New Scientist
Author: Roy B. Chung
Publisher:
ISBN: 9781124885179
Category :
Languages : en
Pages : 137
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Book Description
AlGaN based conventional deep ultraviolet (UV) light emitting diodes (LEDs) grown on a sapphire or SiC substrate suffer from high threading dislocation density (TDD) (> 1 x 109 cm-2). The high quality bulk AlN substrate (TDD & sim; 1 x 104 cm-2) has shown promising results for high power deep UV LEDs but the substrates are not readily available yet. The performance of UV laser diodes (LDs) has been rapidly improved over the past few years. However, intrinsic valence band property of c-plane AlN could result in poor optical gain for c-plane LDs, especially in UV-C range. In this work, different approaches have been explored for further development of UV LEDs and LDs.
Author: IEEE Staff
Publisher:
ISBN: 9781728106038
Category :
Languages : en
Pages :
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Book Description
The IEEE RAPID conference aims to bring together government, academia and industry in a global forum to present new fundamental basic research, innovative technologies and build collaborations to solve critical security and defense challenges This international conference will be broad in scope covering such areas as electromagnetics, device physics, optics and photonics, algorithms, and test and evaluation to name a few With the breadth of topics covered, this conference seeks to attract diverse participation and collaboration from academia, industry, defense and government agencies that will promote security interests with opportunities to increase technical depth and breadth as well as networking with peers In a world where technology is rapidly changing, collaborations and multidisciplinary work is the only way to solve research challenges and foster the next generation of scientific discovery
Author: Karl F. Renk
Publisher: Springer
ISBN: 331950651X
Category : Science
Languages : en
Pages : 677
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Book Description
This textbook provides an introductory presentation of all types of lasers. It contains a general description of the laser, a theoretical treatment and a characterization of its operation as it deals with gas, solid state, free-electron and semiconductor lasers. This expanded and updated second edition of the book presents a description of the dynamics of free-electron laser oscillation using a model introduced in the first edition that allows a reader to understand basic properties of a free-electron laser and makes the difference to “conventional” lasers. The discussions and the treatment of equations are presented in a way that a reader can immediately follow. The book addresses graduate and undergraduate students in science and engineering, featuring problems with solutions and over 400 illustrations.
Author: Richard Scheps
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 302
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Book Description
