Picosecond studies of electron confinement in simple colored glasses

Warnock, J.; Awschalom, D. D.
February 1986
Applied Physics Letters;2/10/1986, Vol. 48 Issue 6, p425
Academic Journal
Time-resolved optical measurements at low temperatures reveal finite size effects for excitons trapped in semiconductor microcrystallites embedded in a simple borosilicate glass. The excitation lifetimes are significantly shorter than those in comparable bulk material, with a marked dependence on crystallite size. The results are interpreted as an effect of three-dimensional confinement with ‘‘box’’ dimensions comparable to the exciton diameter.


Related Articles

  • Non-envelope formulation for femtosecond optical pulses in semiconductors. Mel’nikov, I.V.; Mihalache, D.; Moldoveanu, F.; Panoiu, N.-C. // JETP Letters;3/10/97, Vol. 65 Issue 5, p393 

    We analyze the response of an ensemble of 1s-excitons driven by a femtosecond optical pulse, beyond traditional “slowly varying amplitudes” approach. For optical pulses of a given duration it is shown that the off-resonance optical field can evolve into a stable soliton with nonzero...

  • Transient absorption spectra of a modulation-doped Ga0.47In0.53As/Al0.48In0.52As multiple quantum well structure measured by picosecond infrared pulses. Elsaesser, T.; Bäuerle, R. J.; Kaiser, W.; Lobentanzer, H.; Stolz, W.; Ploog, K. // Applied Physics Letters;1/16/1989, Vol. 54 Issue 3, p256 

    Intersubband and intrasubband scattering of hot electron-hole pairs is studied with picosecond infrared pulses. The carrier distribution function is derived directly from the transient absorption spectra after selective excitation of carriers to the n=1 and 2 subbands. Band filling of the n=1...

  • Ultrafast exciton and excited-exciton dynamics in J-aggregates of three-level porphyrin molecules. Misawa, Kazuhiko; Kobayashi, Takayoshi // Journal of Chemical Physics;3/22/1999, Vol. 110 Issue 12, p5844 

    Studies the ultrafast response of exciton and excited-exciton in one-dimensional J-aggregates of three-level porphyrin molecules by femtosecond pump-probe spectroscopy. Excitation and probe pulses derived from a Ti:sapphire regenerative amplifier; Comparison between Kerr-shutter and the Sagnac...

  • Ultrafast Atomic Displacement in Optical and Soft X-Ray Spectroscopies. Kayanuma, Yosuke; Tanaka, Satoshi // International Journal of Modern Physics B: Condensed Matter Phys;12/10/2001, Vol. 15 Issue 28-30, p3690 

    Recent advances in the spectroscopies of the second order processes both in the optical region and in the soft x-ray region are reviewed from a theoretical standpoint. A peculiar role of the breathing and oscillating spectral hole in the femtosecond pump-probe experiments is pointed out. The...

  • Picosecond time resolved photoluminescence spectroscopy of a tetracene film on highly oriented pyrolytic graphite: Dynamical relaxation, trap emission, and superradiance. Voigt, M.; Langner, A.; Schouwink, P.; Lupton, J. M.; Mahrt, R. F.; Sokolowski, M. // Journal of Chemical Physics;9/21/2007, Vol. 127 Issue 11, p114705 

    A detailed time resolved investigation of the photoluminescence of a thin tetracene film deposited on highly oriented pyrolytic graphite is presented. In agreement with Lim et al. [Phys. Rev. Lett. 92, 107402 (2004)], we find strong evidence for superradiance: an increase of the relative...

  • Subpicosecond time-resolved luminescence spectroscopy of highly excited CuCl. Hulin, D.; Etchepare, J.; Antonetti, A.; Chase, L. L.; Grillon, G.; Migus, A.; Mysyrowicz, A. // Applied Physics Letters;1984, Vol. 45 Issue 9, p993 

    An apparatus for the detection of luminescence spectra with subpicosecond resolution is described. It is applied to the measurement of the formation time of excitonic particles in CuCl.

  • Ultrafast exciton relaxation in monolayer transition metal dichalcogenides. Thilagam, A. // Journal of Applied Physics;4/28/2016, Vol. 119 Issue 16, p1 

    We examine a mechanism by which excitons undergo ultrafast relaxation in common monolayer transition metal dichalcogenides. It is shown that at densities ≈1 × 1011 cm-2 and temperatures ≤60 K, excitons in well known monolayers (MoS2, MoSe2, WS2, and WSe2) exist as point-like...

  • Well separated trion and neutral excitons on superacid treated MoS2 monolayers. Cadiz, Fabian; Tricard, Simon; Gay, Maxime; Lagarde, Delphine; Gang Wang; Robert, Cedric; Renucci, Pierre; Urbaszek, Bernhard; Marie, Xavier // Applied Physics Letters;6/20/2016, Vol. 108 Issue 25, p251106-1 

    Developments in optoelectronics and spin-optronics based on transition metal dichalcogenide monolayers (MLs) need materials with efficient optical emission and well-defined transition energies. In as-exfoliated MoS2 MLs, the photoluminescence (PL) spectra even at low temperature consist...

  • A quantum-classical approach to the molecular dynamics of pyrazine with a realistic model Hamiltonian. Puzari, Panchanan; Sarkar, Biplab; Adhikari, Satrajit // Journal of Chemical Physics;11/21/2006, Vol. 125 Issue 19, p194316 

    We investigate the molecular dynamics of pyrazine after excitation to the S2 electronic state by using the time-dependent discrete variable representation (TDDVR) method. The investigation has been carried out with a realistic 24-mode model Hamiltonian consisting of all the vibrational degrees...


Read the Article


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

Try another library?
Sign out of this library

Other Topics