Direct observation of lateral current spreading in ridge waveguide lasers using scanning voltage microscopy

Ban, D.; Sargent, E. H.; Hinzer, K.; Dixon-Warren, St. J.; SpringThorpe, A. J.; White, J. K.
June 2003
Applied Physics Letters;6/9/2003, Vol. 82 Issue 23, p4166
Academic Journal
We report results of two-dimensional (2D) local voltage measurement of the transverse cross section of operating multiquantum-well ridge-waveguide (RWG) lasers. We observe lateral nonuniformity of local voltage in the n-cladding layers of the laser and attribute the voltage variation to 2D carrier transport effect within the RWG lasers. The quantitative evaluation of this effect indicates the local vertical current density to be ∼40% smaller at the edge of the ridge than at its center. Our results demonstrate the strength and application of scanning voltage microscopy technique in quantitatively delineating 2D current flow in operating optoelectronic devices.


Related Articles

  • Real Time Laser inspection System.  // Welding Design & Fabrication;Apr2003, Vol. 76 Issue 4, p45 

    Introduces the Laser Scanning Inspection System from Romer CimCore. Features of the technology; Capability of real-time inspection; Simplification of data management.

  • Laser scanner breaks artworks into bits. Savage, Neil // Laser Focus World;Apr99, Vol. 35 Issue 4, p32 

    Provides information on Michelangelo's David laser scanner. Features; Capabilities; System setup.

  • RIEGL Hydrographic Airborne Laser Scanner.  // Journal of Ocean Technology;Apr-Jul2012, Vol. 7 Issue 2, p92 

    The article previews the RIEGL hydrographic airborne laser scanner VQ-820-G.

  • 100-cm-1 scan range single-mode dye laser. Uehara, Kiyoji; Sasada, Hiroyuki; Ukaji, Nobuyoshi; Kasuya, Takahiro // Review of Scientific Instruments;Jul1985, Vol. 56 Issue 7, p1352 

    A cw dye laser was automatically tuned as wide as 100 cm[sup -1] with a very simple control system while retaining a narrow spectral width of 15 MHz. This wide scanning was accomplished by repetitive 5-cm[sup -1] sweeps of both the laser cavity and an internal étalon along with a continuous...

  • New Color Laser Scanner.  // Foundry Management & Technology;Apr2007, Vol. 135 Issue 4, p25 

    The article evaluates the portable Laser Scanner LS from Faro Technologies.

  • Design and implementation of an inexpensive target scanner for the growth of thin films by the laser-ablation process. Rao, A. M.; Moodera, J. S. // Review of Scientific Instruments;Apr91, Vol. 62 Issue 4, p1107 

    The design of a target scanner that is inexpensive and easy to construct is described. Our target scanner system does not require an expensive personal computer to raster the laser beam uniformily over the target material, unlike the computer driven target scanners that are currently being used...

  • Improved optical diagnostics for the NOVA laser. Fernandez, Juan C.; Berggren, Ralph R.; Bradley, Keith S.; Hsing, Warren W.; Gomez, Camilo C.; Cobble, James A.; Wilke, Mark D. // Review of Scientific Instruments;Jan1995, Vol. 66 Issue 1, p626 

    Describes three diagnostics detecting optical scanner from NOVA laser targets. Application of such scatter in understanding instabilities in laser plasmas; Detection of the full aperture backscatter station (FABS); Action of the FABS in allowing imaging at high resolution of Brillouin and Raman...

  • Glacial Terrains Scanned to Predict Rock-Fall Hazards.  // GEOWorld;Jul2010, Vol. 23 Issue 7, p7 

    The article offers information on the use of laser scanning and remote-controlled aircraft technology to monitor glaciers in unstable slopes and rock falls.

  • Scanners lend a hand.  // Frontline Solutions;Jan2002, Vol. 3 Issue 1, p60 

    Focuses on the applications of hand-held scanners. Disadvantages of laser and CCD imager; Range of laser scanner by Intermec Technologies; Features of the Code Corporation's Code Reader 1.0 scanner; Design of the KS 3000 Series of heated scanner.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics