Naval Postgraduate School
Dudley Knox Library
NPS Dudley Knox Library
View Item 
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  •   Calhoun Home
  • Theses and Dissertations
  • 1. Thesis and Dissertation Collection, all items
  • View Item
  • How to search in Calhoun
  • My Accounts
  • Ask a Librarian
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of CalhounCollectionsThis Collection

My Account

LoginRegister

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

Near field imaging of gallium nitride nanowires for characterization of minority carrier diffusion

Thumbnail
Download
Icon09Dec_Baird.pdf (2.772Mb)
Download Record
Download to EndNote/RefMan (RIS)
Download to BibTex
Author
Baird, Lee G.
Date
2009-12
Advisor
Haegel, Nancy M.
Second Reader
Luscombe, James
Metadata
Show full item record
Abstract
A novel system has been developed for the imaging of carrier transport within semiconductor nanostructures by operating a near field scanning optical microscopy (NSOM) within a scanning electron microscope. Luminescence associated with carrier recombination is collected with high spatial resolution to monitor the motion and recombination of charge generated by use of an electron beam as an independent point source. Light is collected in the near field from a scanning fiber using tuning fork feedback in an open architecture combined AFM/NSOM system allowing for independent motion of sample and tip. From a single image, it is possible to obtain a direct measure of minority carrier diffusion length. This technique has been used in the near-field collection mode to image the diffusion of holes in n-type GaN-AlGaN coreshell nanowires, unintentionally doped GaN nanowires and p-type GaN nanowires grown via Ni-catalyzed MOCVD. Measurements were made on tapered anowires ranging in diameter from 500 to 800 nm, with lengths up to ~ 30 ?m. The average 1-dimensional carrier diffusion length was measured to be 1.3 +/- 0.2 ?m for GaN/AlGaN core-shell, 0.96 +/- 0.25 ?m for the uncoated GaN wires, and 0.65 +/- 0.35 ?m for the p-tpye uncoated GaN anowires in the low injection limit.
URI
http://hdl.handle.net/10945/4393
Collections
  • 1. Thesis and Dissertation Collection, all items
  • 2. NPS Outstanding Theses and Dissertations

Related items

Showing items related by title, author, creator and subject.

  • Thumbnail

    Near field imaging of charge transport in gallium nitride and zinc oxide nanostructures 

    Cole, Richard Adam (Monterey, California. Naval Postgraduate School, 2010-12);
    A novel technique for imaging minority carrier diffusion in semiconductor nanostructures has been applied to the characterization of GaN and ZnO nanowires and nanobelts. Near field scanning optical microscopy (NSOM) is ...
  • Thumbnail

    Measurement of minority charge carrier diffusion length in Gallium Nitride nanowires using Electron Beam InducedCurrent (EBIC) 

    Ong, Chiou Perng (Monterey, California. Naval Postgraduate School, 2009-12);
    Electron Beam Induced Current (EBIC) measurements were performed on GaN nanowires to determine minority charge carrier diffusion length, d L . Although EBIC has been used to characterize bulk and thin film materials, ...
  • Thumbnail

    Near Field Imaging for the Characterization of Diffusion Length and Waveguiding in Zinc Oxide Nanowires 

    Little, Anree G. (Monterey, California. Naval Postgraduate School, 2012-06);
    A novel technique of near field imaging has been advanced and used to measure free carrier diffusion length and study optical waveguiding in ZnO nanowires. The technique employs a near field scanning optical microscope ...
NPS Dudley Knox LibraryDUDLEY KNOX LIBRARY
Feedback

411 Dyer Rd. Bldg. 339
Monterey, CA 93943
circdesk@nps.edu
(831) 656-2947
DSN 756-2947

    Federal Depository Library      


Start Your Research

Research Guides
Academic Writing
Ask a Librarian
Copyright at NPS
Graduate Writing Center
How to Cite
Library Liaisons
Research Tools
Thesis Processing Office

Find & Download

Databases List
Articles, Books & More
NPS Theses
NPS Faculty Publications: Calhoun
Journal Titles
Course Reserves

Use the Library

My Accounts
Request Article or Book
Borrow, Renew, Return
Tech Help
Remote Access
Workshops & Tours

For Faculty & Researchers
For International Students
For Alumni

Print, Copy, Scan, Fax
Rooms & Study Spaces
Floor Map
Computers & Software
Adapters, Lockers & More

Collections

NPS Archive: Calhoun
Restricted Resources
Special Collections & Archives
Federal Depository
Homeland Security Digital Library

About

Hours
Library Staff
About Us
Special Exhibits
Policies
Our Affiliates
Visit Us

NPS-Licensed Resources—Terms & Conditions
Copyright Notice

Naval Postgraduate School

Naval Postgraduate School
1 University Circle, Monterey, CA 93943
Driving Directions | Campus Map

This is an official U.S. Navy Website |  Please read our Privacy Policy Notice  |  FOIA |  Section 508 |  No FEAR Act |  Whistleblower Protection |  Copyright and Accessibility |  Contact Webmaster

Export search results

The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

A logged-in user can export up to 15000 items. If you're not logged in, you can export no more than 500 items.

To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.