scholarly journals The role of the interface in germanium quantum dots: when not only size matters for quantum confinement effects

Nanoscale ◽  
2015 ◽  
Vol 7 (26) ◽  
pp. 11401-11408 ◽  
Author(s):  
S. Cosentino ◽  
A. M. Mio ◽  
E. G. Barbagiovanni ◽  
R. Raciti ◽  
R. Bahariqushchi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Ge Quantum Dots ◽  
Germanium Quantum Dots ◽  
Interface Effects

This work elucidates the interplay between quantum confinement and interface effects in the optical properties of Ge quantum dots, demonstrating that not only size matters at the nanoscale.

Matrix and quantum confinement effects on optical and thermal properties of Ge quantum dots

2012 ◽  
Vol 45 (10) ◽  
pp. 105303 ◽  
Author(s):  
J E Chang ◽  
P H Liao ◽  
C Y Chien ◽  
J C Hsu ◽  
M T Hung ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Thermal Properties ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Ge Quantum Dots

scholarly journals Quantum confinement effects in Si/Ge heterostructures with spatially ordered arrays of self-assembled quantum dots

2010 ◽  
Vol 96 (22) ◽  
pp. 222107 ◽  
Author(s):  
Oleksiy B. Agafonov ◽  
Christian Dais ◽  
Detlev Grützmacher ◽  
Rolf J. Haug
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Ordered Arrays ◽  
Quantum Confinement Effects ◽  
Self Assembled

Ultrafast Electron Dynamics in Ge Quantum Dots

1999 ◽  
Vol 571 ◽  
Author(s):  
A. Stella ◽  
P. Tognini ◽  
S. De Silvestri ◽  
M. Nisoli ◽  
S. Stagira ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Conduction Band ◽  
Quantum Confinement ◽  
Spectral Feature ◽  
Wavelength Region ◽  
Electron Dynamics ◽  
Quantum Confinement Effects ◽  
Pump And Probe ◽  
Carrier Interaction ◽  
Ge Quantum Dots

ABSTRACTAn analysis of the ultrafast response of Ge quantum dots, with average radii of 4 nm and 16 nm, is reported here. Pump and probe experiments allowed investigation of the wavelength region between 450 and 750 nrm, characterized by the absorption peaks due to the E, and E1+Δ1 interband transitions. Two different time regimes have been identified: a first one (τ ≤ 1 ps) associated with pump-induced conduction band filling in the τ-L direction in the Brillouin zone; a second one (τ up to 100 ps) associated with band gap renormalization caused by the carrier interaction in the conduction band. Quantum confinement effects show up in terms of sizedependent blueshift of the E1+Δ1 spectral feature.

Quantum confinement effects on the optical phonons of CdTe quantum dots

1998 ◽  
Vol 23 (5) ◽  
pp. 1103-1106 ◽  
Author(s):  
A.M. de Paula ◽  
L.C. Barbosa ◽  
C.H.B. Cruz ◽  
O.L. Alves ◽  
J.A. Sanjurjo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement ◽  
Cdte Quantum Dots ◽  
Optical Phonons ◽  
Confinement Effects ◽  
Quantum Confinement Effects

Photoluminescence of carbon quantum dots: coarsely adjusted by quantum confinement effects and finely by surface trap states

2018 ◽  
Vol 61 (4) ◽  
pp. 490-496 ◽  
Author(s):  
Zexi Liu ◽  
Hongyan Zou ◽  
Ni Wang ◽  
Tong Yang ◽  
Zhewei Peng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement ◽  
Carbon Quantum Dots ◽  
Trap States ◽  
Confinement Effects ◽  
Surface Trap ◽  
Quantum Confinement Effects

QUANTUM CONFINEMENT EFFECTS ON THE OPTICAL PROPERTIES OF ION BEAM SPUTTERED NICKEL OXIDE THIN FILMS

2001 ◽  
Vol 15 (02) ◽  
pp. 191-200 ◽  
Author(s):  
M. GHANASHYAM KRISHNA ◽  
A. K. BHATTACHARYA
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nickel Oxide ◽  
Band Gap ◽  
Quantum Confinement ◽  
Ion Beam ◽  
Confinement Effects ◽  
Oxide Thin Films ◽  
Quantum Confinement Effects ◽  
Nickel Oxide Thin Films

Quantum confinement effects on the optical properties of ion beam sputtered nickel oxide thin films are reported. Thin films with crystallite sizes in the range 9 to 14 nm have been deposited on to fused silica substrates. There is an increase in band gap, from 3.4 to 3.9 eV, and a decrease in refractive index, from 2.4 to 1.6, with decrease in crystallite size, that can be attributed to quantum confinement effects. The effective mass approximation has been used to explain the observed behaviour in band gap variation.

Quantum Confinement Effects on Electronic Properties of ZnO Quantum Dots

2014 ◽  
Vol 6 (11) ◽  
pp. 1158-1166 ◽  
Author(s):  
Nacir Tit ◽  
Sawsan Dagher ◽  
Ahmad Ayesh ◽  
Yousef Haik
Keyword(s):  
Quantum Dots ◽  
Electronic Properties ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Zno Quantum Dots

Quantum confinement effects on the phonons of PbTe quantum dots in tellurite glasses

2008 ◽  
Author(s):  
G. J. Jacob ◽  
D. B. Almeida ◽  
W. M. Faustino ◽  
E. Rodrigues ◽  
C. H. Brito ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement ◽  
Tellurite Glasses ◽  
Confinement Effects ◽  
Quantum Confinement Effects
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