Relation between size dispersion and line shape in quantum dot ensembles

Nikolaev, V. V.; Averkiev, N. S.
December 2009
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p263107
Academic Journal
We propose a method to model the density of optical transitions, absorption, and differential-absorption spectra of quantum dot ensembles. The developed approach combines physical straightforwardness of the conventional Gaussian-peak modeling with a more preside account of the influence of size dispersion on the line shape of quantum dots.


Related Articles

  • Acoustic Phonons in a Quantum Dot—Matrix System: Hole-Burning Spectroscopy. Fedorov, A. V.; Kruchinin, S. Yu. // Optics & Spectroscopy;Sep2004, Vol. 97 Issue 3, p394 

    A theory of burning spectral holes in an inhomogeneously broadened light absorption profile of quantum dots embedded in a dielectric matrix has been developed. The emphasis was on the possibility of using hole-burning spectroscopy to study the interaction of the electron subsystem of quantum...

  • Dispersion measurements of a 1.3 μm quantum dot semiconductor optical amplifier over 120 nm of spectral bandwidth. Bagnell, M.; Davila-Rodriguez, J.; Ardey, A.; Delfyett, P. J. // Applied Physics Letters;5/24/2010, Vol. 96 Issue 21, p211907 

    Group delay and higher order dispersion measurements are conducted on a 1.3 μm quantum dot semiconductor optical amplifier at various injection currents. White-light spectral interferometry is performed, along with a wavelet transform to recover the group delay. The group delay, group...

  • Tuning of conduction intersublevel absorption wavelengths in (In, Ga)As/GaAs quantum-dot nanostructures. Pan, Dong; Towe, Elias; Kennerly, Steve; Kong, Mei-Ying; Mei-Ying Kong // Applied Physics Letters;6/12/2000, Vol. 76 Issue 24 

    We demonstrate that by increasing the amount of (In, Ga)As deposit in a quantum dot layer, the intersublevel absorption wavelength for (In, Ga)As/GaAs quantum-dot infrared photodetectors can be blue-shifted from 15 to 10 μm while the photoluminescence peak is red-shifted. We directly compare...

  • Microscopic surface photovoltage spectroscopy of the CdSe/ZnCdMgSe quantum dots structures. Malikova, L.; Holden, Todd; Perez-Paz, M. Noemi; Muñoz, M.; Tamargo, M. C. // Applied Physics Letters;3/9/2009, Vol. 94 Issue 10, pN.PAG 

    We present room temperature microscopic (100 nm resolution) surface photovoltage spectra of three CdSe/ZnCdMgSe quantum dot structures with different CdSe deposition times. Observed spectroscopic features were attributed to absorption in the barrier, quantum dot, and wetting layer. Good...

  • Composition effects on quantum dot-based resonance energy transfer. Sadhu, Suparna; Patra, Amitava // Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p183104 

    The effect of composition on resonance energy transfer between CdxZn1-xS quantum dot (donor) and Nile red dye (acceptor) is studied by steady state and time-resolved spectroscopy. The energy transfer efficiency varies from 14% to 47% with change in the composition from Cd0.31Zn0.69S to...

  • Optical nonlinearity of monodispersed, capped ZnS quantum particles. Nikesh, V. V.; Dharmadhikari, Aditya; Ono, Hiroshi; Nozaki, Shinji; Kumar, G. Ravindra; Mahamuni, Shailaja // Applied Physics Letters;6/7/2004, Vol. 84 Issue 23, p4602 

    ZnS quantum dots are synthesized by a high-temperature chemical route with narrow size distribution at diameters of 1.4 and 1.8 nm. Significantly small size dispersion of 1.4-nm-sized ZnS quantum dots is vivid from the transmission electron microscopic measurements. The nonlinear absorption is...

  • Steady state photoinduced absorption of PbS quantum dots film. Jian Zhang; Xiaomei Jiang // Applied Physics Letters;4/7/2008, Vol. 92 Issue 14, p141108 

    We have measured steady state photoinduced absorption (PIA) of PbS quantum dot (QD) film in an energy range of interband electronic transitions at low temperature. PIA spectra show both positive and negative PIAs corresponding to five consecutive interband transitions. The close resemblance...

  • Quantum control by selective population of dressed states using intense chirped femtosecond laser pulses. Wollenhaupt, M.; Präkelt, A.; Sarpe-Tudoran, C.; Liese, D.; Baumert, T. // Applied Physics B: Lasers & Optics;Feb2006, Vol. 82 Issue 2, p183 

    The physical mechanism of strong field quantum control using chirped femtosecond laser pulses is investigated. Dressed state control is exerted by making explicit use of the temporal phase changes of the pulse. In our experiment, the dressed state population is mapped by photoelectron spectra...

  • Diode-pumped Tm:KY(WO4)2 laser passively Q-switched with PbS-doped glass. Gaponenko, M .S.; Denisov, I. A.; Kisel, V. E.; Malyarevich, A. M.; Zhilin, A. A.; Onushchenko, A. A.; Kuleshov, N. V.; Yumashev, K. V. // Applied Physics B: Lasers & Optics;Dec2008, Vol. 93 Issue 4, p787 

    Glass doped with PbS quantum dots is presented as a saturable absorber (SA) for a passive Q-switching of a diode-pumped 1.9 μm Tm:KYW laser. Output pulses with energy of 44 μJ at a repetition rate of 2.5 kHz with an average output power of 110 mW were obtained. The Q-switching conversion...


Read the Article


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

Try another library?
Sign out of this library

Other Topics