Picosecond nonlinear optical response of a Cu:silica nanocluster composite

Haglund, Richard F.; Yang, Li; Magruder, R.H.; Wittig, J. E.; Becker, Klaus; Zuhr, R.A.

doi:10.1364/ol.18.000373

Cited by 227 publications

(85 citation statements)

References 12 publications

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“…This is not the intrinsic nonlinear index of LiNbO 3 , which is negative, as was confirmed by a z-scan of an unimplanted area. The nonlinear indices reported here are at least one order of magnitude greater than those reported for other silver clusters in the literature [26]. This indicates the presence of the cumulative thermal self-focussing effect which can still occur for the short pulses used in this work due to the, • relatively high pulse repetition rate (76 MHz versus 3.8 MHz in Ref.…”

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confidence: 47%

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Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO₃

et al. 1997

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We present the results of characterization of linear absorption and nonlinear refractive index of Au, Ag, Cu and Sn ion implantation into LiNbO3. Silver was implanted at 1.5 MeV to fluences of 2 to 17 × 1016/cm2 at room temperature. Gold and copper were implanted to fluences of 5 to 20 × 1016/cm2 at an energy of 2.0 MeV. Tin was implanted to a fluence of 1.6 × 1017/cm2 at 160 kV. After heat treatment at 1000°C a strong optical absorption peak for the Au implanted samples appeared at ∼620 nm. The absorption peaks of the Ag implanted samples shifted from ∼450 nm before heat treatment to 550 nm after 500°C for lh. Heat treatment at 800°C returned the Ag implanted crystals to a clear state. Cu nanocluster absorption peaks disappears at 500°C. No Sn clusters were observed by optical absorption or XRD. The size of the Ag and Au clusters as a function of heat treatment were determined from the absorption peaks. The Ag clusters did not appreciably change in size with heat treatment. The Au clusters increased from 3 to 9 nm in diameter upon heat treatment at 1000°C. TEM analysis performed on a Au implanted crystal indicated the formation of Au nanocrystals with facets normal to the c-axis. Measurements of the nonlinear refractive indices made using the Z-scan method showed that Ag implantation changed the sign of the nonlinear index of LiNbO3 from negative to positive.

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confidence: 47%

“…This indicates the presence of the cumulative thermal self-focussing effect which can still occur for the short pulses used in this work due to the, • relatively high pulse repetition rate (76 MHz versus 3.8 MHz in Ref. [26]). For the Au implanted LiNbO 3 a positive t^ was seen prior to heat treatment as well as after cluster formation was observed.…”

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confidence: 82%

Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO₃

et al. 1997

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“…A very high optical nonlinearlity  (3) ~10 -7 esu which was comparable [8] or one order lower [9] than that for Au nanoclusters system, was reported. An one order lower value of  (3) ~10 -8 esu was recorded on Cu nanoclusters dispersed in silica matrix with picosecond nonlinear optical response [10]. In a microreactor approach [33], Au NPs embedded in silica matrix showed optical switching with the exposure of 532 nm, which was close to the SPR absorption peak for Au NPs.…”

Section: Introductionmentioning

confidence: 88%

“…Optical switching using the enhanced third-order nonlinear susceptibility in noble metal systems [7][8][9][10], especially near the surface-plasmon-resonance (SPR) frequency evoked considerable interest among scientific researchers during last one and half decade. Coherent…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon polariton assisted optical switching in noble bimetallic nanoparticle system

Dhara

Magudapathy

et al. 2015

Applied Physics Letters

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Photoresponse of bimetallic Au-Ag nanoparticle embedded soda glass (Au-Ag@SG) substrate is reported for surface plasmon assisted optical switching using 808 nm excitation.Au-Ag@SG system is made by an ion beam technique where Ag + is introduced first in the soda glass matrix by ion exchange technique. Subsequently 400 keV Au + is implanted in the sample for different fluences which is followed by an ion beam annealing process using 1MeV Si + at a fixed fluence of 2E16 ions.cm -2 . Characteristic surface plasmon resonance (SPR) peaks around 400 and 550 nm provided evidence for the presence of Au and Ag nanoparticles. An optical switching in the Au-Ag@SG system with 808 nm, which is away from the characteristic SPR peaks of Ag and Au nanoparticles, suggests the possible role of TPA owing to the presence of interacting electric dipole in these systems. The role of surface plasmon polariton is emphasized for the propagation of electronic carrier belonging to the conduction electron of Au-Ag system in understanding the observed photoresponse. Unique excitation dependent photoresponse measurements confirm the possible role of TPA process.A competitive interband and intraband transitions in the bimetallic system of Au and Ag with 2 may be primarily responsible for the observation, which are validated qualitatively using finite difference time domain calculations where inter-particle separation of Au and Ag play an important role. Thus, a smart way of optical switching can be envisaged in noble bimetallic nanocluster system where long wavelength with higher skin depth can be used for communication purpose.

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“…In some predictions enhancement factors are 10 3 -10 6 compared to the fundamental electric field at a flat metal surface. Due to these prominent features such as tuning of light-matter interaction strength in the case of nanoparticles made of highly conductive material, nanoparticles are not only widely studied [8][9][10] but also already applied in various fields such as nanobiosensors in disease treatment [11,12], as absorptive, fluorescent or scattering optical sensors in biology [12,13].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear properties of silver nanoparticles explored by a femtosecond Z-scan technique

Alesenkov¹,

Pilipavičius²,

Beganskienė³

et al. 2015

Lith. J. Phys.

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In this report we present results of linear and nonlinear optical properties of colloidal material consisting of triangle silver nanoparticles in distilled water. The nonlinear optical properties of the material were investigated by a Z-scan technique using femtosecond laser pulses with tunable wavelength. Nanoparticle suspension showed distinct spectra with absorption lines, emerging due to the plasmonic properties of the silver nanoparticles. Surface plasmon resonance peak change over a wide range of wavelengths from 400 to almost 1100 nm was observed when the size of silver nanoparticles varied from 20 to 150 nm. In the samples different nonlinear effects such as saturable absorption, two photon absorption and self-focusing were observed when the femtosecond pulse intensity was changed from 1 up to 100 GW/cm 2 .

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Picosecond nonlinear optical response of a Cu:silica nanocluster composite

Cited by 227 publications

References 12 publications

Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO₃

Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO₃

Surface plasmon polariton assisted optical switching in noble bimetallic nanoparticle system

Nonlinear properties of silver nanoparticles explored by a femtosecond Z-scan technique

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Picosecond nonlinear optical response of a Cu:silica nanocluster composite

Cited by 227 publications

References 12 publications

Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO3

Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO3

Surface plasmon polariton assisted optical switching in noble bimetallic nanoparticle system

Nonlinear properties of silver nanoparticles explored by a femtosecond Z-scan technique

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Product

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Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO₃

Study of the Effects of MeV Ag, Cu, Au and Sn Implantation on the Optical Properties of LiNbO₃