Confocal two-photon spectroscopy of red mercuric iodide

Wen, X. M.; Xu, Paul; Lukins, Philip B.; Ohno, N.
July 2003
Applied Physics Letters;7/21/2003, Vol. 83 Issue 3, p425
Academic Journal
One- and two-photon fluorescence of red mercuric iodide single crystal was studied using confocal laser scanning microscopy and spectroscopy at room temperature. There is a clear difference in the fluorescence spectra for one- and two-photon excitation. With two-photon excitation, a fluorescent band is found at the band gap and its central wavelength shifts toward lower energy with increasing depth below the surface, whereas the fluorescent band for one-photon excitation remains invariant with depth. There is an approximately 70 μm thick defect transition layer near the surface and the defect concentration decreases approximately linearly from the surface to the bulk. The band-gap energy at room temperature is determined as 2.12 eV, which is consistent with previous studies.


Related Articles

  • The rotational spectrum of iodine dioxide, OIO. Miller, Charles E.; Cohen, Edward A. // Journal of Chemical Physics;4/8/2003, Vol. 118 Issue 14, p6309 

    The rotational spectrum of the OIO radical has been observed for the first time. Spectra of both the ground and first two excited bending vibrational states have been analyzed. Rotational, centrifugal distortion, fine, and hyperfine constants have been derived. These constants have been used to...

  • Spectroscopic detection and characterization of iodogermylene (HGel). Harper, Warren W.; Klusek, Chad M. // Journal of Chemical Physics;12/1/1998, Vol. 109 Issue 21, p9300 

    Examines the spectroscopic detection and characterization of iodogermylene. Use of pulsed discharge and laser-induced fluorescence techniques; Analysis of the partially resolved rotational structure of the energy bands; Account on the fluorescence lifetime of the monoiodogermylene.

  • Rotational spectroscopy of IO X [sup 2]Π[sub i]. Miller, Charles E.; Cohen, Edward A. // Journal of Chemical Physics;10/8/2001, Vol. 115 Issue 14 

    Pure rotational spectra of the IO radical have been observed for vibrational levels up to v=13 in the X[sub 1] [sup 2]Π[sub 3/2] state and up to v=9 in the X[sub 2] [sup 2]Π[sub 1/2] state. Isotopically enriched I[sup 18]O rotational spectra have been observed for vibrational levels up to...

  • Advances in mercuric iodide energy dispersive x-ray array detectors and associated miniaturized processing electronics (invited). Iwanczyk, J. S.; Dorri, N.; Wang, M.; Szawlowski, M.; Warburton, W. K.; Hedman, B.; Hodgson, K. O. // Review of Scientific Instruments;Jul1989, Vol. 60 Issue 7, p1561 

    There are important areas of synchrotron radiation research which would strongly benefit from the availability of energy dispersive detector arrays with high energy resolution and good spatial resolution. The goal of this developmental project is to produce a several element mercuric iodide...

  • Clusters in the model ferroelastic Hg[sub 2]Cl[sub 2]. Markov, Yu. F.; Knorr, K. // Physics of the Solid State;Jan99, Vol. 41 Issue 1, p132 

    The critical fluctuations induced by a ferroelastic phase transition and corresponding to the soft TA mode at the X point at Brillouin zone boundary have been studied in the model crystal Hg[sub 2]Cl[sub 2] within a broad temperature and wave-vector range. Anisotropic diffuse x-ray scattering...

  • Generalized relativistic effective core potential and relativistic coupled cluster calculation of the spectroscopic constants for the HgH molecule and its cation. Mosyagin, Nikolai S.; Titov, Anatoly V.; Eliav, Ephraim; Kaldor, Uzi // Journal of Chemical Physics;Aug2001, Vol. 115 Issue 5, p2007 

    Generalized relativistic effective core potential (GRECP) calculations of spectroscopic constants of the HgH molecule ground and low excited states and the HgH[sup +] cation ground state are carried out, with correlation included by the Fock-space relativistic coupled cluster (RCC) method. Basis...

  • Uniformity of optical absorption in HgCdTe epilayer measured by infrared spectromicroscopy. Phiiiips, J. D.; Moazzami, K.; Kim, J.; Edwall, D. D.; Lee, D. L.; Arias, J.M. // Applied Physics Letters;11/3/2003, Vol. 83 Issue 18, p3701 

    Infrared absorption in HgCdTe epitaxial material has been investigated using infrared spectromicroscopy to study the uniformity at dimensions representative of typical infrared detectors. Infrared transmission measurements were performed on HgCdTe material using an infrared beam diameter of 9...

  • A Broadband Excimer Source of Visible Radiation with Barrier Discharge Pumping. Milinin, A.N.; Polyak, A.V. // Optics & Spectroscopy;Dec2003, Vol. 95 Issue 6, p925 

    We investigate the characteristics of a broadband cylindrical excimer source of visible radiation with a surface area of 230 cm[sup 2] excited by a pulse-periodic barrier discharge based on multicomponent mixtures (mercury diiodide and dibromide with helium and admixtures of molecular nitrogen...

  • Modulated photoluminescence of shallow levels in arsenic-doped Hg1-xCdxTe (x≈0.3) grown by molecular beam epitaxy. Fangyu Yue; Junhao Chu; Jun Wu; Zhigao Hu; Yawei Li; Pingxiong Yang // Applied Physics Letters;3/24/2008, Vol. 92 Issue 12, p121916 

    Shallow levels in arsenic-doped Hg1-xCdxTe grown by molecular beam epitaxy have been investigated by temperature- and excitation power-dependent modulated photoluminescence spectroscopy. The ionization energies of the shallow levels of AsTe, AsHg, and the AsHg–VHg complex are...


Read the Article


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

Try another library?
Sign out of this library

Other Topics