Carrier dynamics, optical nonlinearities, and optical gain in nanocrystal quantum dots

2003 ◽  
pp. 73-111
Author(s):  
Victor I. Klimov
Keyword(s):  
Quantum Dots ◽  
Optical Gain ◽  
Carrier Dynamics ◽  
Optical Nonlinearities ◽  
Nanocrystal Quantum Dots

Few-Particle Effects in Nonlinear Optical Spectra of Semiconductor Quantum Dots

1999 ◽  
Vol 571 ◽  
Author(s):  
Ulrich Hohenesteri ◽  
Fausto Rossi ◽  
Elisa Molinari
Keyword(s):  
Quantum Dots ◽  
Density Matrix ◽  
Nonlinear Optical ◽  
Coherent Control ◽  
Optical Spectra ◽  
Carrier Dynamics ◽  
Semiconductor Quantum Dots ◽  
Nonequilibrium Carrier ◽  
Optical Nonlinearities ◽  
Matrix Approach

ABSTRACTWe present a density-matrix approach for the description of nonequilibrium carrier dynamics in optically excited semiconductor quantum dots, that explicitly accounts for exciton-exciton as well as exciton-carrier interactions. Within this framework, we analyze few-particle effects in the optical spectra and provide a consistent description of additional peaks appearing at high photoexcitation density. We discuss possible applications of such optical nonlinearities in future coherent-control experiments.

scholarly journals Ultra-fast charge carrier dynamics across the spectrum of an optical gain media based on InAs/AlGaInAs/InP quantum dots

AIP Advances ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 035122 ◽  
Author(s):  
I. Khanonkin ◽  
A. K. Mishra ◽  
O. Karni ◽  
V. Mikhelashvili ◽  
S. Banyoudeh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Charge Carrier ◽  
Optical Gain ◽  
Carrier Dynamics ◽  
Fast Charge ◽  
Charge Carrier Dynamics ◽  
Inp Quantum Dots ◽  
Gain Media

scholarly journals Optical gain from InAs nanocrystal quantum dots in a polymer matrix

2005 ◽  
Vol 87 (25) ◽  
pp. 251108 ◽  
Author(s):  
Gang Chen ◽  
Ronen Rapaport ◽  
Dan T. Fuchs ◽  
Leah Lucas ◽  
Andrew J. Lovinger ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Polymer Matrix ◽  
Optical Gain ◽  
Nanocrystal Quantum Dots

scholarly journals Nanocrystal Quantum Dots: Building Blocks for Tunable Optical Amplifiers and Lasers

2001 ◽  
Vol 667 ◽  
Author(s):  
Jennifer A. Hollingsworth ◽  
Alexander A. Mikhailovsky ◽  
Anton Malko ◽  
Victor I. Klimov ◽  
Catherine A. Leatherdale ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Confinement ◽  
Optical Amplifiers ◽  
Optical Gain ◽  
Building Blocks ◽  
Stimulated Emission ◽  
Optical Amplification ◽  
Organometallic Reactions ◽  
Wide Range ◽  
Nanocrystal Quantum Dots

ABSTRACTWe study optical processes relevant to optical amplification and lasing in CdSe nanocrystal quantum dots (NQD). NQDs are freestanding nanoparticles prepared using solution-based organometallic reactions originally developed for the Cd chalcogenides, CdS, CdSe and CdTe [J. Am. Chem. Soc. 115, 8706 (1993)]. We investigate NQDs with diameters ranging from 2 to 8 nm. Due to strong quantum confinement, they exhibit size-dependent spectral tunability over an energy range as wide as several hundred meV. We observe a strong effect of the matrix/solvent on optical gain properties of CdSe NQDs. In most of the commonly used solvents (such as hexane and toluene), gain is suppressed due to strong photoinduced absorption associated with carriers trapped at solvent-related interface states. In contrast, matrix-free close packed NQD films (NQD solids) exhibit large optical gain with a magnitude that is sufficiently high for the optical gain to successfully compete with multiparticle Auger recombination [Science 287, 10117 (2000)]. These films exhibit narrowband stimulated emission at both cryogenic and room temperature, and the emission color is tunable with dot size [Science 290, 314 (2000)]. Moreover, the NQD films can be incorporated into microcavities of different geometries (micro-spheres, wires, tubes) that produce lasing in whispering gallery modes. The facile preparation, chemical flexibility and wide-range spectral tunability due to strong quantum confinement are the key advantages that should motivate research into NQD applications in optical amplifiers and lasers.

Carrier dynamics and optical gain in colloidal InP-based quantum dots

2021 ◽  
Author(s):  
Filipe Velosa ◽  
Hannes van Avermaet ◽  
Pieter Schiettecatte ◽  
Leila Mingabudinova ◽  
Pieter Geiregat ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Gain ◽  
Carrier Dynamics

scholarly journals Achieving Optical Gain of the CsPbBr3 Perovskite Quantum Dots and Influence of the Variable Stripe Length Method

ACS Omega ◽  
2021 ◽  
Author(s):  
Saif M. H. Qaid ◽  
Hamid M. Ghaithan ◽  
Bandar Ali Al-Asbahi ◽  
Abdullah S. Aldwayyan
Keyword(s):  
Quantum Dots ◽  
Optical Gain ◽  
Perovskite Quantum Dots ◽  
Stripe Length

scholarly journals Dark-level trapping, lateral confinement, and built-in electric field contributions to the carrier dynamics in c-plane GaN/AlN quantum dots emitting in the UV range

2021 ◽  
Vol 129 (5) ◽  
pp. 054301
Author(s):  
M. Hrytsaienko ◽  
M. Gallart ◽  
M. Ziegler ◽  
O. Crégut ◽  
S. Tamariz ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electric Field ◽  
Carrier Dynamics ◽  
Lateral Confinement ◽  
Uv Range
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