TITLE

Molecular-beam-epitaxy-grown ZnMgS ultraviolet photodetectors

AUTHOR(S)
Sou, I. K.; Wu, Marcus C. W.; Sun, T.; Wong, K. S.; Wong, G. K. L.
PUB. DATE
March 2001
SOURCE
Applied Physics Letters;3/26/2001, Vol. 78 Issue 13, p1811
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Epitaxial growth of Zn[sub 1-x]Mg[sub x]S alloy thin films on GaP(100) substrates was carried out using the molecular-beam-epitaxy technique. In situ reflection high-energy electron diffraction studies show that the alloys can be grown with a stable zinc-blende structure up to x around 30%. For x>30%, a structural transition will occur at a critical thickness which is sensitively dependent on the x composition. A near-band-edge peak with a full width at half maximum of about 10 nm was observed in room-temperature photoluminescence measurements made on as-grown alloy thin films. Several Zn[sub 1-x]Mg[sub x]S-based Schottky barrier photodetectors were fabricated. Room-temperature photoresponse measurements were performed on these detectors and abrupt long-wavelength cutoffs covering 325, 305, 295, and 270 nm were achieved for devices with Mg composition of 16%, 44%, 57%, and 75%, respectively. The response curve of the Zn[sub 0.43]Mg[sub 0.57]S device offers a close match to the erythemal action spectrum that describes human skin sensitivity to UV radiation. © 2001 American Institute of Physics.
ACCESSION #
4711199

 

Related Articles

  • Structure and magnetic properties of Co grown on yttria-stabilized cubic zirconia substrates. Yu, C. C.; Lee, S. F.; Yao, Y. D.; Cheng, W. C.; Chen, D. C.; Liou, Y. // Journal of Applied Physics;5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p7197 

    Cobalt films have been grown on yttria-stabilized cubic zirconia (YSZ) (100) and (110) substrates by molecular beam epitaxy. Both hcp(0001) and fcc(111) twin structures and fcc(110) films have been successfully fabricated on the YSZ(100) and (110), respectively. For the Co on YSZ(100) case, the...

  • Magnetic crystallographic anisotropy of Fe/GaAs(100) epitaxial films. Vysotskii, S. L.; Gel�bukh, S. S.; Dzhumaliev., A. S.; Kazakov, G. T.; Filimonov, Yu. A.; Tsyplin, A. Yu. // Technical Physics Letters;Jan99, Vol. 25 Issue 1, p79 

    An investigation was made of the anisotropic properties of Fe films obtained by molecular-beam epitaxy on GaAs(100) substrates. It is shown that at thicknesses t = 40-50 � the Fe films begin to exhibit cubic magnetic anisotropy. At thicknesses t > 100 � the first constant of cubic...

  • Growth of matched metallic ErP0.6As0.4 layers on GaAs in a molecular beam epitaxy system. Le Corre, A.; Caulet, J.; Guivarc’h, A. // Applied Physics Letters;11/27/1989, Vol. 55 Issue 22, p2298 

    Metallic layers of ErP0.6As0.4 have been grown by molecular beam epitaxy on GaAs at 500 °C. The growth has been achieved by adjusting the PH3 and AsH3 flows to obtain a good lattice match to the substrate, the erbium flux remaining below the flux of the V elements. The 10–100 nm thick...

  • Epitaxial structure and magnetic anisotropies of metastable single crystal Co[sub 0.70]Mn[sub 0.30] film. Zhao, H. W.; Chen, Y.; Zhu, W. R.; Dong, G. S.; Jin, X. F.; Lu, M.; Zhai, H. R. // Journal of Applied Physics;2/15/1997, Vol. 81 Issue 4, p2036 

    Alloy films of Co[sub 0.70]Mn[sub 0.30] were grown on GaAs (001) substrates by molecular beam epitaxy at room temperature. The metastable tetragonally distorted single crystal structure was confirmed by reflection high energy electron diffraction and x-ray diffraction measurement, which...

  • Highly efficient light emission from ZnS[sub 1-x]Te[sub x] alloys. Sou, I.K.; Wong, K.S. // Applied Physics Letters;4/10/1995, Vol. 66 Issue 15, p1915 

    Examines the optical properties of ZnS[sub 1-x]Te[sub x] alloy films grown by molecular beam epitaxy. Presence of tellurium (Te) isoelectric hole traps in the films; Relationship between Te composition and Stokes shift of the luminescence peak; Observation of strong bowing in the band-gap energy.

  • Epitaxial growth of lead phthalocyanine film on KI crystal. Hoshi, Hajime; Fang, Shaoli; Maruyama, Yusei // Journal of Applied Physics;3/15/1993, Vol. 73 Issue 6, p3111 

    Presents a study which examined the application of the molecular-beam epitaxy technique for the growth of an epitaxial film of lead phthalocyanine. Brief introduction to the process; Description of the experimental setup; Results.

  • Magnetic domains in epitaxial nanomagnets with uniaxial or fourfold crystal anisotropy. Pulwey, R.; Zo¨lfl, M.; Bayreuther, G.; Weiss, D. // Journal of Applied Physics;5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p7995 

    In order to prepare submicron sized particles with strong magnetocrystalline anisotropies high quality epitaxial bcc-Fe films were grown on GaAs(110) and GaAs(001) by molecular beam epitaxy. Whereas Fe(ll0) on GaAs(ll0) is a model system with uniaxial in-plane anisotropy, Fe(001) on GaAs(001)...

  • Biaxial exchange anisotropy in PtMn/Ni[sub 80]Fe[sub 20](110) bicrystal films. Huang, J. C. A.; Yu, C. C.; Lee, C. H. // Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p4921 

    By using molecular beam epitaxy PtMn/Ni[sub 80]Fe[sub 20] bilayers were prepared on Mo(100) seeding layer on MgO(100) substrate. X-ray diffraction showed that the PtMn/Ni[sub 80]Fe[sub 20] bilayers were mainly grown as (110) bicrystal films with 90° twin domains. The exchange anisotropy was...

  • Ozone assisted, block-by-block, molecular beam epitaxy of La–M–Mn–O (M=Ca,Ba,Sr) thin films and La–M–Mn–O/Dy–Ba–Cu–O multilayers (abstract). Vas’ko, V. A.; Kraus, P. A.; Achutharaman, V. S.; Nordman, C. A.; Goldman, A. M. // Journal of Applied Physics;4/15/1996, Vol. 79 Issue 8, p4553 

    Presents the abstract of the study 'Ozone Assisted, Block-by-Block, Molecular Beam Epitaxy of La-M-Mn-O (M=-Ca, Br, Sr) thin films and L-M-Mn-O/Dy-Ba-Cu-O Multilayers,' by V.A. Vas'ko, P.A. Kraus, V.S. Achutharaman, C.A. Nordman and A.M. Goldman.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics