Fano-control of down-conversion in a nonlinear crystal via plasmonic–quantum emitter hybrid structures

Artvin, Zafer; Günay, Mehmet; Bek, Alpan; Tașgın, Mehmet Emre

doi:10.1364/josab.405637

Cited by 4 publications

(4 citation statements)

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“…Where m accounts for the coupling strength between fundamental harmonic and DM, and κ is the coupling strength of SH and DM. Also, the forth term corresponds to the hybridization of â1 -mode to generate â2 -mode with χ (2) being the strength of the nonlinear signal is derived from overlap integral [11]. The polarization of the driving field is along the x-axis as shown in figure 1(a) with resonant frequency ω.…”

Section: Aunp-agnr Coupled Nonlinear Plasmonic Systemmentioning

confidence: 99%

“…The third term corresponds to the coupling of QE to SH mode along with interaction parameter κ. The last term in equation (11). is the convolution of SH mode through the overlap of â1 -modes, with χ (2) being the measure of SH response efficiency.…”

Section: Aunp-qe Coupled Nonlinear Plasmonic Systemmentioning

confidence: 99%

“…Numerous studies have reported the increase in the intensity of nonlinear plasmon mode (not the lifetime) by coupling it with different quantum objects (plasmonic nanoparticles, QD, defect centers, or molecules) [9][10][11]. For instance, the intensity of the second harmonic (SH) field has been modulated in the steady-state regime by coupling SH mode to quantum emitter (QE) [12].…”

Section: Introductionmentioning

confidence: 99%

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Modulating the temporal dynamics of nonlinear ultrafast plasmon resonances

Asif¹,

Şahin²

2022

J. Opt.

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Surface plasmon-induced nonlinear optical resonances have shown immense potential in advanced optical imaging and nonlinear photonic devices. However, the ultrashort lifetime of these intense nonlinear fields inhibits their effective use in the vast applications of quantum plasmonics. Here, we propose enhancement in the lifetime of fast decaying second harmonic (SH) plasmon mode through a weak and pure resonant interaction with a two-level quantum emitter (QE). We compute the time evolution of SH response under a two-coupled oscillator model, in which we examine the interaction of short-lived SH mode supported by Au nanoparticle (AuNP) with long-lived Dark mode (DM) or QE systems. To analyze the effect of spectral and temporal properties of DM and QE on the SH field, we evaluate the lifetime enhancement factor as a function of coupling strength and tuned resonant frequencies. The results show that a tiny object like QE with sharp spectral bandwidth, small decay rate, and large oscillating strength is more efficient to control and probe the temporal dynamics of the SH field, as compared to DM which has a wide spectral bandwidth. Also, we control the lifetime of the SH mode after the natural decay time of the fundamental mode (FM), which distinguishes SH mode irrespective of its spatial convolution with elementary modes. Our proposed AuNP-QE coupled plasmonic system supporting nonlinear signal with enhanced temporal character paves its way for designing efficient on-chip nonlinear optical devices and can be a powerful tool in ultrahigh-resolution nonlinear optical imaging.

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Section: Aunp-agnr Coupled Nonlinear Plasmonic Systemmentioning

confidence: 99%

Section: Aunp-qe Coupled Nonlinear Plasmonic Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modulating the temporal dynamics of nonlinear ultrafast plasmon resonances

Asif¹,

Şahin²

2022

J. Opt.

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“…( 1) describe the linear and nonlinear interaction of driven and SH (LSPR) of AuNP with AgNR(dark mode) respectively where m accounts for the coupling strength between driven mode and dark mode and K is the coupling between SH and dark mode. Also, χ (2) is defined as the strength of nonlinear mode derived from overlap integral [24]. The polarization of the driving field is along the x-axis as shown in Fig.…”

Section: A Aunp-agnr Coupled Nonlinear Plasmonic Systemmentioning

confidence: 99%