Degenerate four-wave mixing from layered semiconductor clusters in the quantum size regime

Sarid, Dror; Rhee, Bum Ku; McGinnis, Brian P.; Sandroff, Claude J.
November 1986
Applied Physics Letters;11/3/1986, Vol. 49 Issue 18, p1196
Academic Journal
We report the first measurement of the third-order nonlinear susceptibility χ(3) in layered semiconductor clusters exhibiting pronounced quantum size effects at room temperature. BiI3 clusters prepared in colloidal form in acetonitrile had a thickness of [bar_over_tilde:_approx._equal_to]7 Å and lateral dimensions between 60 and 90 Å. Using degenerate four-wave mixing, we observed that the conjugate pulses from the small and the large gratings had comparable intensities, verifying the electronic origin of the nonlinearity. The nonlinear susceptibility was found to be 2.3×10-11 esu for a colloid with a cluster volume fraction of 10-5.


Related Articles

  • Femtosecond study of photo-induced electron dynamics in AgI and core/shell structured.... Brelle, Michael C.; Zhang, Jin Z. // Journal of Chemical Physics;2/22/1998, Vol. 108 Issue 8, p3119 

    Examines the dynamics of photoinduced electrons in AgI, AgI/Ag[sub 2]S, and AgBr/Ag[sub 2]S semiconductor colloidal nanoparticles. Use of silver halides in the photographic process; Preparation of the silver iodide colloids; Observation of decay dynamics in core/shell structured cocolloids of...

  • n-type colloidal semiconductor nanocrystals. Shim, Moonsub; Guyot-Sionnest, Philippe // Nature;10/26/2000, Vol. 407 Issue 6807, p981 

    Presents a study in which n-type colloidal semiconductor nanocrystals were fabricated using an electron transfer approach commonly employed in the field of conducting organic polymers. Importance of the ability to control the electron occupation in these molecules for tailoring electrical and...

  • Experimental Determination of the Fluorescence Quantum Yield of Semiconductor Nanocrystals. Laverdant, Julien; de Marcillac, Willy Daney; Barthou, Carlos; Vu Duc Chinh; Schwob, Catherine; Coolen, Laurent; Benalloul, Paul; Pham Thu Nga; Maître, Agnès // Materials (1996-1944);Jul2011, Vol. 4 Issue 7, p1182 

    Many studies have considered the luminescence of colloidal II-VI nanocrystals, both in solution at a collective scale and at an individual scale by confocal microscopy. The quantum yield is an important figure of merit for the optical quality of a fluorophore. We detail here a simple method to...

  • Tuning the optical and electronic properties of colloidal nanocrystals by lattice strain. Smith, Andrew M.; Mohs, Aaron M.; Nie, Shuming // Nature Nanotechnology;Jan2009, Vol. 4 Issue 1, p56 

    Strain can have a large influence on the properties of materials at the nanoscale. The effect of lattice strain on semiconductor devices has been widely studied, but its influence on colloidal semiconductor nanocrystals is still poorly understood. Here we show that the epitaxial deposition of a...

  • Real time observation of partial dislocations in thin colloidal crystals. Luo, Yi-Yong; Hu, Shu-Xin; Lu, Ying; Mai, Zhen-Hong; Li, Ming // Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p174107 

    We use laser diffraction microscopy to visualize in real time the motion of partial dislocations in thin colloidal crystals confined in flat capillaries. The results show that the formation of partial dislocation loops with their associated stacking faults is an energetically preferred...

  • Temperature dependence of the exciton transition in semiconductor quantum dots. Liptay, Thomas J.; Ram, Rajeev J. // Applied Physics Letters;11/27/2006, Vol. 89 Issue 22, p223132 

    The authors measure the temperature dependence of the first absorption feature (dE/dT) for different sizes of CdSe/ZnS nanocrystals. In contrast to previous experiments, they find that dE/dT is experimentally identical for all nanocrystal sizes considered and agrees well with the bulk CdSe...

  • On Optical Properties of Dilute Colloidal Gold. Kontturi, Ville; Silfsten, Pertti; Räty, Jukka; Peiponen, Kai-Erik // Plasmonics;Jun2011, Vol. 6 Issue 2, p345 

    Wavelength-dependent complex effective refractive index of dilute colloidal gold, i.e., spherical gold nanoparticles in water was measured using a reflectometer and a spectrophotometer. The spectral data obtained was used for the calculation of the wavelength-dependent complex permittivity of...

  • Crystal gazing. Ball, Philip // New Scientist;11/29/97, Vol. 156 Issue 2110, p40 

    States that crystals made from plastic beads (colloidal crystals) could be very important in applications as diverse as optical computer and biosensors. Detailed information on colloidal crystals; Reference to experiment conducted on space shuttle, Columbia, in 1995; Indepth look at crystals.

  • Observation and tuning of hypersonic bandgaps in colloidal crystals. Wei Cheng; Jianjun Wang; Ulrich Jonas; George Fytas; Nikolaos Stefanou // Nature Materials;Oct2006, Vol. 5 Issue 10, p830 

    Composite materials with periodic variations of density and/or sound velocities, so-called phononic crystals, can exhibit bandgaps where propagation of acoustic waves is forbidden. Phononic crystals are the elastic analogue of the well-established photonic crystals and show potential for...


Read the Article


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

Try another library?
Sign out of this library

Other Topics