scholarly journals Systematic study of near-infrared intersubband absorption of polar and semipolar GaN/AlN quantum wells

2013 ◽  
Vol 113 (14) ◽  
pp. 143109 ◽  
Author(s):  
H. Machhadani ◽  
M. Beeler ◽  
S. Sakr ◽  
E. Warde ◽  
Y. Kotsar ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Systematic Study ◽  
Near Infrared ◽  
Intersubband Absorption ◽  
Semipolar Gan

Intersubband absorption of cubic GaN/Al(Ga)N quantum wells in the near-infrared to terahertz spectral range

2011 ◽  
Vol 83 (7) ◽  
Author(s):  
H. Machhadani ◽  
M. Tchernycheva ◽  
S. Sakr ◽  
L. Rigutti ◽  
R. Colombelli ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Spectral Range ◽  
Near Infrared ◽  
Intersubband Absorption ◽  
Cubic Gan

Systematic study of intersubband absorption in modulation-doped p-typeSi/Si1−xGex quantum wells

1994 ◽  
Vol 37 (4-6) ◽  
pp. 941-944 ◽  
Author(s):  
T. Fromherz ◽  
E. Koppensteiner ◽  
M. Helm ◽  
G. Bauer ◽  
J.F. Nützel ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Systematic Study ◽  
Intersubband Absorption

Calculation of Near-Infrared Intersubband Absorption Spectra in GaN/AlN Quantum Wells

2003 ◽  
Vol 42 (Part 1, No. 1) ◽  
pp. 132-139 ◽  
Author(s):  
Nobuo Suzuki ◽  
Norio Iizuka ◽  
Kei Kaneko
Keyword(s):  
Quantum Wells ◽  
Absorption Spectra ◽  
Near Infrared ◽  
Intersubband Absorption

Intersubband Absorption in Modulation Doped p-type Si/Si1-xGex Quantum Wells: a Systematic Study

1993 ◽  
Author(s):  
T. Fromherz ◽  
E. Koppensteiner ◽  
M. Helm ◽  
G. Bauer ◽  
J. F. Nutzel ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Systematic Study ◽  
Intersubband Absorption ◽  
P Type

scholarly journals Polarized near-infrared intersubband absorptions in CdSe colloidal quantum wells

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Benjamin T. Diroll ◽  
Menglu Chen ◽  
Igor Coropceanu ◽  
Kali R. Williams ◽  
Dmitri V. Talapin ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Near Infrared ◽  
Building Blocks ◽  
Two Dimensional ◽  
Intersubband Transitions ◽  
Spectral Window ◽  
Hot Carrier ◽  
Intersubband Absorption ◽  
Carrier Temperature ◽  
Two Dimensional Materials

Abstract Colloidal quantum wells are two-dimensional materials grown with atomically-precise thickness that dictates their electronic structure. Although intersubband absorption in epitaxial quantum wells is well-known, analogous observations in non-epitaxial two-dimensional materials are sparse. Here we show that CdSe nanoplatelet quantum wells have narrow (30–200 meV), polarized intersubband absorption features when photoexcited or under applied bias, which can be tuned by thickness across the near-infrared (NIR) spectral window (900–1600 nm) inclusive of important telecommunications wavelengths. By examination of the optical absorption and polarization-resolved measurements, the NIR absorptions are assigned to electron intersubband transitions. Under photoexcitation, the intersubband features display hot carrier and Auger recombination effects similar to excitonic absorptions. Sequenced two-color photoexcitation permits the sub-picosecond modulation of the carrier temperature in such colloidal quantum wells. This work suggests that colloidal quantum wells may be promising building blocks for NIR technologies.

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