Strongly modified four-wave mixing in a coupled semiconductor quantum dot-metal nanoparticle system

Abstract

Articles you may be interested inPrecise control of photoluminescence enhancement and quenching of semiconductor quantum dots using localized surface plasmons in metal nanoparticles Enhanced photorefractive effect in liquid crystal structures co-doped with semiconductor quantum dots and metallic nanoparticlesWe study the four-wave mixing effect in a coupled semiconductor quantum dot-spherical metal nanoparticle structure. Depending on the values of the pump field intensity and frequency, we find that there is a critical distance that changes the form of the spectrum. Above this distance, the four-wave mixing spectrum shows an ordinary three-peaked form and the effect of controlling its magnitude by changing the interparticle distance can be obtained. Below this critical distance, the four-wave mixing spectrum becomes single-peaked; and as the interparticle distance decreases, the spectrum is strongly suppressed. The behavior of the system is explained using the effective Rabi frequency that creates plasmonic metaresonances in the hybrid structure. In addition, the behavior of the effective Rabi frequency is explained via an analytical solution of the density matrix equations. V C 2014 AIP Publishing LLC. [http://dx.

Resonance fluorescence spectrum of aΛ-type quantum emitter close to a metallic nanoparticle

“…The ultracompact optical mode volume achieved in plasmon nanostructures leads to a large resonant enhancement of the local field near the MNP [1][2][3][4], as well as the modification of spontaneous emission rates of the emitter's optical transitions [5][6][7][8][9][10][11]. The exciton-plasmon coupling has received a great deal of attention leading to interesting phenomena like changes in photoluminescence lifetimes [12], in photon statistics [13], in the resonance fluorescence [14][15][16][17][18][19], in plasmon-induced quantum interference effects [20][21][22], in the control over population dynamics [23][24][25][26], and over nonlinear optical processes [27][28][29][30][31][32][33][34].…”

Investigation of coherent molecular resonances in quantum dot–metallic nanoparticle systems using their spontaneous emission

“…Such a coupling also allows us to control the speed of light propagation in the medium [28], generate bistability and hysteresis [29][30][31][32][33], switch from bistability to multistability [34], induce Rabi and plasmonic field oscillations [35,21], and generate Fano-type features or plasmonic electromagnetically induced transparency [36,30,[37][38][39]. Coherent exciton-plasmon coupling can also alter four wave mixing and reverse the course of energy transfer between the QDs and MNPs allowing energy drain from the MNPs to the QDs [22,40].…”

“…1c). This suggests that the spontaneous emission of QDs can provide key information regarding the B-D resonances, called plasmonic metaresonances (PMRs) [20,22]. We investigate the impact of tuning of such molecular resonances on the emission of the QDs and demonstrate how it influences the spectral excitation density of excitons.…”

Pump-probe optical response of an asymmetric double quantum dot molecule

“…In parallel, the nonlinear optical response of semiconductor quantum wells [19][20][21][22][23][24][25][26] and semiconductor quantum dots [27][28][29][30][31][32][33][34][35] that interact simultaneously with a strong pump field and a weak probe field has also been studied and phenomena such as controlled absorption and optical transparency, the ac-Stark effect, optical gain, enhanced selfKerr nonlinearity with low absorption, enhanced four-wave mixing and even slow light have been shown. We note that the subject of the interaction of a quantum (atomic) system simultaneously driven by a strong pump field and a weak probe field started by Mollow more than 40 years ago [36] and was extended by several others [37][38][39][40][41][42][43][44][45].…”