Nonlinear optical susceptibilities of semiconductor quantum dot – metal nanoparticle hybrids

Terzis, Andreas; Kosionis, Spyridon G.; Boviatsis, J.; Paspalakis, Emmanuel

doi:10.1080/09500340.2015.1079655

Cited by 73 publications

(48 citation statements)

References 34 publications

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“…Moreover, the Kerr nonlinearity can be significantly enhanced in hybrid nanocomposites providing a promising platform for integrated optics with potential nonlinear applications [ 34 , 35 , 36 ]. Therefore, the Kerr nonlinearity has been investigated for different hybrid systems in order to study the role of exciton-plasmon coupling [ 37 , 38 ] and investigate the contribution of both QD and MNP susceptibilities in the total nonlinear susceptibility of the hybrid system [ 39 ]. Interestingly, the MNP-GND-QD hybrid systems demonstrate controllable ultrafast energy exchange between plasmons and excitons [ 40 ], that can be associated with high Kerr nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance

2018

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Hybrid nanocomposites can provide a promising platform for integrated optics. Optical nonlinearity can significantly widen the range of applications of such structures. In the present paper, a theoretical investigation is carried out by solving the density matrix equations derived for a metal nanoparticles-graphene nanodisks-quantum dots hybrid system interacting with weak probe and strong control fields, in the steady state. We derive analytical expressions for linear and third-order nonlinear susceptibilities of the probe field. A giant self-Kerr nonlinear index of refraction is obtained in the optical region with relatively low light intensity. The optical absorption spectrum of the system demonstrates electromagnetically induced transparency and amplification without population inversion in the linear optical response arising from the negative real part of the polarizabilities for the plasmonic components at the energy of the localized surface plasmon resonance of the graphene nanodisks induced by the probe field. We find that the self-Kerr nonlinear optical properties of the system can be controlled by the geometrical features of the system, the size of metal nanoparticles and the strength of the control field. The controllable self-Kerr nonlinearities of hybrid nanocomposites can be employed in many interesting applications of modern integrated optics devices allowing for high nonlinearity with relatively low light intensity.

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Section: Introductionmentioning

confidence: 99%

Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance

2018

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“…62 Note that the relaxation times T 1 and T 2 are also influenced by the presence of the MNP but in the present case and in the frequency range considered, the values of T 1 and T 2 can be taken as constant, as in previous works in similar systems. 28,[31][32][33][34][35][36][37][38][39] In what follows, we set C 0 ¼ 1/T 2 ; thus, the different parameters (Rabi frequency, detuning, etc.) in Eq.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Several interesting optical effects have been studied in this hybrid nanostructure, including Fano-type phenomena in absorption of energy, [3][4][5][6][7] controlled coherent population transfer and ultrafast switching, [8][9][10][11][12][13][14][15] gain without inversion, [16][17][18][19] controlled optical bistability, 20-23 strongly modified resonance fluorescence, 18,[24][25][26][27][28][29][30] and four-wave mixing, [31][32][33][34] as well as plasmon-enhanced difference-frequency generation, 35 second-harmonic generation, 36,37 terahertz emission, 38 and Kerr nonlinearity. 39 Besides on-chip nanoscale photonic nonlinear devices, the coupled QD-MNP system may also have important applications in quantum technology, 40,41 sensing, 42 and medicine. 43,44 The purpose of the present work is to study the nonlinear optical response of an asymmetric QD coupled to a spherical MNP.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical rectification and optical bistability in a coupled asymmetric quantum dot-metal nanoparticle hybrid

Carreño

Antón

Paspalakis

2018

Journal of Applied Physics

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We study the optical response of a coupled asymmetric semiconductor quantum dot-spherical metal nanoparticle structure. The asymmetric quantum dot has permanent electric dipole moments that also interact with light. We derive the density matrix equations for the system including the modification of the electric field and the exciton-plasmon coupling. We emphasize on the effects of the nonlinear optical rectification and controlled optical bistability and analyze these phenomena for different values of the light intensity and different distances between the quantum dot and the metal nanoparticle. We show that when the system is set in a situation where optical bistability can be produced, the optical rectification of the hybrid system is bivalued. We also analyze the slow-down to reach the steady state when the system is driven close and far from the turning points.

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“…Recently, SPPs in MNPs have been widely studied in plasmonic literature. [ 24–31 ] In Section 1, we surveyed the literature for random lasers and nanofiber hybrids. In Section 2, the effect of the SPP and DDI is investigated on the bound photons in plasmonic nanofibers.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Radiative and Nonradiative Emission in Random Lasing Plasmonic Nanofibers

Singh

Brassem

Yastrebov³

2021

Annalen der Physik

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A theory of light–matter interaction in plasmonic nanofibers is developed. When probe light propagates inside the nanofiber, it induces surface plasmon polariton (SPPs) and electric dipoles in metallic nanoparticles. The dipoles interact with each other via dipole–dipole interaction (DDI). The energy of photonic bound states in the presence of the SPP and DDI fields are calculated. It has been demonstrated that the number of bound states can be controlled by the strength of SPP and DDI couplings. The spontaneous decay rate for the quantum emitters have been calculated and it is found that decay rate is enhanced when the exciton energy is in resonance with the bound photon energy. Further, it is predicted that the spontaneous decay rate also enhances when the exciton and SPP energies are in resonance. Finally, the photoluminescence in nanofiber is calculated using the density matrix method. The authors' theory is compared with experiments and found a good agreement between theory and experiments. It has been demonstrated that the quenching of the photoluminescence intensity increases as the concentration of the MNPs increases. The findings of the paper can be used to fabricate random lasers and also for inventing new types of nanosensors and nanoswitches.

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Nonlinear optical susceptibilities of semiconductor quantum dot – metal nanoparticle hybrids

Cited by 73 publications

References 34 publications

Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance

Giant Self-Kerr Nonlinearity in the Metal Nanoparticles-Graphene Nanodisks-Quantum Dots Hybrid Systems Under Low-Intensity Light Irradiance

Nonlinear optical rectification and optical bistability in a coupled asymmetric quantum dot-metal nanoparticle hybrid

Enhancement of Radiative and Nonradiative Emission in Random Lasing Plasmonic Nanofibers

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