High responsivity A-plane GaN-based metal-semiconductor-metal photodetectors for polarization-sensitive applications

Date

2009-05-25

Author

Navarro, A.
Rivera, C.
Pereiro, J.
Munoz, E.
İmer, Muhsine Bilge
DenBaars, S. P.
Speck, J. S.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

37
views

0
downloads

The fabrication and characterization of metal-semiconductor-metal polarization-sensitive photodetectors based on A-plane GaN grown on R-plane sapphire substrates is reported. These photodetectors take advantage of the in-plane crystal anisotropy, which results in linear dichroism near the band gap energy. The high resistivity of the A-plane GaN material leads to extremely low dark currents. For an optimized finger spacing of 1 mu m, dark current density and responsivity at 30 V are 0.3 nA/mm(2) and 2 A/W, respectively. A maximum polarization sensitivity ratio of 1.8 was determined. In a differential configuration, the full width at half maximum of the polarization-sensitive region is 8.5 nm.

Subject Keywords

Physics and Astronomy (miscellaneous)

URI

https://hdl.handle.net/11511/46507

Journal

APPLIED PHYSICS LETTERS

DOI

https://doi.org/10.1063/1.3143230

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Photoelectrochemical cell using dye sensitized zinc oxide nanowires grown on carbon fibers Ünalan, Hüsnü Emrah; Suzuki, Kenichi; Dalal, Sharvari; Hiralal, Pritesh; Matsumoto, Hidetoshi; Imaizumi, Shinji; Minagawa, Mie; Tanioka, Akihiko; Flewitt, Andrew J.; Milne, William I.; Amaratunga, Gehan A. J. (AIP Publishing, 2008-09-29) Zinc oxide (ZnO) nanowires (NWs) grown on carbon fibers using a vapor transport and condensation approach are used as the cathode of a photoelectrochemical cell. The carbon fibers were obtained by electrospray deposition and take the form of a flexible carbon fabric. The ZnO NW on carbon fiber anode is combined with a "black dye" photoabsorber, an electrolyte, and a platinum (Pt) counterelectrode to complete the cell. The results show that ZnO NW and carbon fibers can be used for photoinduced charge separat...
Stable, self-ballasting field emission from zinc oxide nanowires grown on an array of vertically aligned carbon nanofibers Li, C.; Zhang, Y.; Mann, M.; Hiralal, P.; Ünalan, Hüsnü Emrah; Lei, W.; Wang, B. P.; Chu, D. P.; Pribat, D.; Amaratunga, G. A. J.; Milne, W. I. (AIP Publishing, 2010-04-05) A structure composed of zinc oxide nanowires (ZNWs) grown hydrothermally on an array of vertically aligned carbon nanofibers (CNFs) was fabricated and its field emission properties determined and compared with bare CNF arrays. The combination produced a macroscopic turn-on field of 1.2 V/mu m which was found to be the lowest reported from ZNWs deposited on a two-dimensional substrate and much less than the equivalent CNFs array (5.2 V/mu m). Crucially, field emission was found to be much more stable at high...
Improved quality (11(2)over-bar-0) a-plane GaN with sidewall lateral epitaxial overgrowth İmer, Muhsine Bilge; DenBaars, SP; Speck, JS (AIP Publishing, 2006-02-06) We demonstrate a technique to reduce the extended defect densities in a-plane GaN deposited on r-plane sapphire. The SiO2 lateral epitaxial overgrowth mask consisted of < 1100 >(GaN) stripes. Both the mask and GaN were etched through the mask openings and the lateral growth was initiated from the etched c-plane GaN sidewalls, and the material was grown over the mask regions until a smooth coalesced film was achieved. Threading dislocation densities in the range of 10(6)-10(7) cm(-2) were realized throughout...
Readiness of the ATLAS liquid argon calorimeter for LHC collisions Aad, G.; et. al. (Springer Science and Business Media LLC, 2010-12-01) The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing performance, elect...
Polarization anisotropy in GaN films for different nonpolar orientations studied by polarized photoreflectance spectroscopy Misra, P; Behn, U; Brandt, O; Grahn, HT; İmer, Muhsine Bilge; Nakamura, S; DenBaars, SP; Speck, JS (AIP Publishing, 2006-04-17) We use photoreflectance (PR) spectroscopy to study the electronic band structure modification of GaN films grown along different nonpolar orientations due to biaxial, anisotropic in-plane strain. The exciton transition energies of an unstrained, high-quality C-plane GaN film are used to accurately determine the crystal-field and spin-orbit splitting energies. For films with a nonpolar orientation, the resonant features observed in the PR spectra exhibit a strong in-plane polarization anisotropy and differen...

Citation Formats

A. Navarro et al., “High responsivity A-plane GaN-based metal-semiconductor-metal photodetectors for polarization-sensitive applications,” APPLIED PHYSICS LETTERS, pp. 0–0, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46507.