This double resonant excitation of localized graphene plasmons leads to strong enhancement of the local optical field, which in conjunction with the strong overlap. High harmonic generation by resonant plasmon field enhancement article pdf available in nature 4537196. Plasmoninduced enhancement of nonlinear optical processes in. Osa enhancement of high harmonic generation by confining. Surface plasmon enhanced third order harmonic generation. Highharmonic generation by resonant plasmon field enhancement. The necessary intensity is reached via plasmonic field enhancement at. By combining nanofabrication technology and ultrafast strong field physics, our work paves the way for designing new compact ultrafast photonic devices that operate under high intensities and short wavelengths21. Over 1800 times enhancement of second harmonic generation from a cavityembedded knbo 3 nanowire at a resonance frequency was observed. Nano antenna assisted high harmonic generation youtube. Design and optimization of a 3d pyramidal nanowaveguide with a square crosssection for plasmonic field enhancement for high harmonic generation. The proposed composite structure made of algaas exhibits resonant response at both the fundamental and doubled frequencies.
Surface plasmon polariton wave propagation in a pyramidal 3d nanostructural waveguide carved in silver substrate is numerically studied by using fdtd method. High harmonics generation by plasmonic field enhancement high harmonics generation by plasmonic field enhancement kim, seungwoo 20090820 00. Moreover, enhancement of the optical near field with localized plasmonic resonances of metallic nanoparticles greatly increases the conversion efficiency of the nonlinear process. In addition, the resonant frequency of the metasurface can be adjusted by dynamically tuning the fermi energy of graphene via electrical or chemical doping. Resonant enhancement of secondharmonic generation in the mid. Seungwoo kim, seungchul kim, inyong park, and joonhee choi. Sep 23, 2011 we demonstrate electrically tunable harmonic generation of light from a plasmonic nanocavity filled with a nonlinear medium. Choi, high harmonic generation by resonant plasmon field enhancement, in conference on lasers and electrooptics 2010, osa technical digest cd optical society of america, 2010, paper cthq1. Plasmon assisted highharmonic generation in graphene. However, most of the previous reports on nonlinear signal generation are based on only using a resonant. A strong dependence of the shg enhancement upon the optical mode distribution was observed. Silencing and enhancement of secondharmonic generation in.
High harmonic generation by resonant plasmon field. Nonlinear processes induced by the enhanced, evanescent. Local field asymmetry drives second harmonic generation in noncentrosymmetric nanodimers. Pdf high harmonic generation by resonant plasmon field. Surface plasmon coupling and its universal size scaling in metal nanostructures of complex geometry. Diffraction resonance with strong optical field enhancement from gainassisted hybrid plasmonic structure. High harmonic generation by plasmonic field enhancement. Authors contribution the sole author designed, analyzed and interpreted and prepared the manuscript. Enhanced third harmonic generation with graphene metasurfaces. This nonlinear conversion process requires high pulse intensities, greater than 10 wcm 2, which are not directly attainable using only the output power of a femtosecond oscillator. High harmonic and single attosecond pulse generation using plasmonic field enhancement in ordered arrays of gold nanoparticles with chirped laser pulses. Nearfield surface plasmon field enhancement induced by. The halfwavelength thz nanoantennas proposed in this work show instead local field enhancement factors and extinction efficiencies of the order of hundreds.
Highlyefficient longitudinal secondharmonic generation from. Resonant field enhancements from metal nanoparticle arrays. Field enhancement and spectral features of hexagonal necklaces of silver nanoparticles for enhanced nonlinear optical processes. Nanoparticleonmirror cavity modes for huge andor tunable plasmonic field enhancement. We explain how to produce coherent xuv radiation at high repetition rate by means of high harmonic generation using locally enhanced femtosecond laser pulses by surface plasmon. Colloidal aucoreagshell nanorods with an asymmetric transverse crosssection and a strong octupolar plasmon resonance are synthesized by the controlled growth of ag shells on one side of the au cores. Phasematched nonlinear secondharmonic generation in. High harmonic generation hhg is an extreme nonlinear optical phenomenon first observed by driving atomic gases with intense ultrashort light pulses 1,2,3. Amplifying local electromagnetic fields by engineering optical interactions between individual constituents of an optical antenna is considered fundamental for efficient nonlinear wavelength conversion in nanometerscale devices. Plasmonassisted highharmonic generation in graphene. Ultrahigh field enhancing in split ring resonators by. A promising solution is to design field enhancement nanostructures on a surface10,14,1618,23,24.
A south korean group has recently proposed an alternative 2 for high harmonic generation, using the amplification of the local electric field induced by resonant surface plasmons in metallic nanostructures. Enhanced highharmonic generation from an alldielectric. Surface plasmon polaritons have been shown to amplify. Surface plasmons resonance within metallic nanostructures enables electric field enhancement of a lowintensity femtosecond pulse laser, permitting high harmonic generation without additional power amplification. Electrically controlled nonlinear generation of light with. Enhanced secondharmonic generation from double resonant. High harmonic generation hhg is a coherent frequencyconversion process arising from gaseous atoms 1,2,3,4 or crystalline solids 5,6,7 when they are irradiated by an intense laser pulse. Extremely large extinction efficiency and field enhancement.
Third harmonic upconversion enhancement from a single semiconductor nanoparticle coupled to a plasmonic antenna. A largely enhanced second harmonic generation shg from these asymmetric coreshell nanorods is demonstrated for the first time by tuning the dipolar and the octupolar plasmon modes to. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate. May 17, 2016 plasmonic electric near field enhancement in selforganized gold nanoparticles in macroscopic arrays. By designing and studying a nonlinear plasmonicgraphene metasurface at terahertz regime. Maximum field enhancement of 97 db is obtained by using such structure which is enough to initiate high harmonic generation process. Postdoc in high harmonic generation assisted by plasmonic. High harmonic generation hhg was first reported in rare gas atoms22. In the process of hydrodynamic expansion of clusters, the electron plasma frequency passes through the surface plasmon resonance, leading to resonant enhancement in the harmonic yield.
Theoretical studies of high order harmonic generation in various media 777 4. Estimate of the local field enhancement the measured increase in high harmonic signal when an array is illuminated compared to the emission from an unpatterned area can be used to estimate the actual intensity enhancement near the nanoantennas. Highharmonic generation hhg was first reported in rare gas atoms1. Surface plasmon enhanced third order harmonic generation of organic materials fanghui ren 1, xiangyu wang 1, zhongan li 2, jingdong luo 2, sei hum jang 2, alex k y jen 2, alan x. Optical second harmonic generation enhancement via plasmonic surface theory and applications nadia mohammed jassim1 1department of physics, college of science, university of diyala, iraq. Doubleresonant enhancement of thirdharmonic generation in.
Furthermore, three times increase in amplification volume is acquired as compared with other. Wang, high sensitivity and large field enhancement of symmetry broken au nanorings. Finally, when both beams illuminate the hybrid grating structure, the simulations show local field enhancement in both slits. We report on the strong enhancement of midinfrared second harmonic generation shg from sic nanopillars due to the resonant excitation of localized surface phonon polaritons within the reststrahlen band. Near field surface plasmon field enhancement induced by rippled surfaces the occurrence of plasmon resonances on metallic nanometerscale structures is an intrinsically nanoscale phenomenon, given that the two resonance conditions i.
Kim s, jin j h, kim y j, park i y, kim y and kim s w 2008 high harmonic generation by resonant plasmon field enhancement nature 453 75760. Fieldenhanced highorderharmonic generation hhg using plasmonics. Osa high order harmonic generation based on resonant. Recently, we successfully exploited the phenomenon of localized surface plasmon resonance for high harmonic generation, which enables replacing cpa with a compact metallic nanostructure. Second harmonic generation dynamic in plasmonic nanoparticles. High order harmonic generation in xenon with oscillator repetition rates is presented. Thus, we prove that by properly engineering the spectral location of plasmon resonances a pair of such resonances exist at the fundamental frequency ff and third harmonic th.
These manifest in the simultaneous appearance of both the so called above threshold ionization ati 12 and high harmonic generation hhg,14 processes on atoms or at surfaces. We design an asymmetric nonlinear optical nanoantenna composed of a dielectric nanodisc and an adjacent nanobar. Feb 22, 2017 the situation is further complicated by the enormous electromagnetic field intensities required by this highly nonperturbative nonlinear optical phenomenon. Resonant enhancement of secondharmonic generation in the. Optical field enhancement at cusps between adjacent. We perform a detailed analysis of highorder harmonic generation hhg. Polarizationcontrolled tunable directional coupling of.
Enhanced highharmonic generation from an alldielectric metasurface. Request pdf selective high harmonic generation by charge transfer plasmon resonant nanodimers here, we study the possibility of selective high harmonic generation hhg based on the concept of. Previously, lattice plasmon lp structures,, have been used to control and enhance high harmonic generation,,, and fourwave mixing by supporting matching resonant modes for both the fundamental and nonlinear signals. Highorder harmonic generation in laser surface ablation. High harmonics generation by plasmonic field enhancement. Nanolaser field enhancement plasmon enhanced fluorescence solar cells. Stepping into this high field region, nonperturbative qed processes are expected. This effect has been utilized to achieve higher harmonic generation from a host medium using. High harmonic emission from crystalline silicon can be made ten times brighter by exploiting local plasmonic fields in arrays of nanoantennas. We perform a detailed analysis of high order harmonic generation hhg in atoms within the strong field approximation sfa by considering spatially inhomogeneous monochromatic laser fields. The objective of our research is to exploit the newly emerging field of ultrafast optics so as to establish ultraprecision technologies that will enable nanofabrication and metrology over extensive ranges as demanded in the next generation of precision engineering. The metals that define the cavity also serve as electrodes that can generate high direct current electric fields across the nonlinear material. Abstract high harmonic generation arises from intense laser beams where odd harmonics of a fundamental frequency up to a cutoff threshold are generated. Enhancement mechanisms of the second harmonic generation.
Quantumorbit analysis of highorder harmonic generation by. We study high order harmonic generation hhg resulting from the illumination of plasmonic nanostructures with a short laser pulse of long wavelength. High harmonic generation by focusing a femtosecond laser onto a gas is a wellknown. This cutoff nth multiple is intensity dependent and the ionization potential of an atomic system. One such mode, the monopole, exhibits an enhancement that is beyond what is anticipated from field. Silencing and enhancement of second harmonic generation in optical. An effective scheme to enhance the yield of high order harmonic generation originated from spatially inhomogeneous field through the interaction between fewcycle chirped laser pulses and a nanotip structure is demonstrated. Osa significantly enhanced conversion efficiency of high. A paper demonstrating high harmonic generation that requires no extra amplifier cavities. Generation of isolated sub10attosecond pulses in spatially inhomogenous twocolor fields xu cao, 1 shicheng jiang, chao yu, yunhui wang, lihua bai,2,4 and ruifeng lu1,3, 1 department of applied physics, nanjing university of science and technology, nanjing 210094, china 2 department of physics, shanghai university, shanghai 200444, china 3 state key laboratory of molecular reaction dynamics. Quantumorbit analysis of highorder harmonic generation by resonant plasmon field enhancement. We investigate how the individual pairs of quantum orbits contribute to the harmonic spectra. Conventionally hhg is based on the use of high power amplified femtosecond laser pulses, special phase matching techniques, or intra.
High harmonic generation by focusing a femtosecond laser onto a gas is a wellknown method of producing coherent extremeultraviolet euv light. We observe nontrivial wavelength and angular dependencies of the generated harmonic signal featuring a multifold enhancement of the nonlinear response in oligomeric systems. This new concept of generating euv light was previously demonstrated by the authors using nanoantennas made of au bowties. Multifold enhancement of thirdharmonic generation in. For example, when illuminating the double resonant grating with only the 1200 nm light, the local field enhancement in the resonant slits of d 1 155 nm is the same when the d 2 75 nm slits are not present. A photoniccrystal optical antenna for extremely large. We measure third harmonic generation thg as a function of infrared fundamental wavelength for gold nanoparticles over a gold film. We demonstrate through rigorous timedomain simulations that the synergistic combination of strong plasmonic near field enhancement and a pronounced intrinsic. Seungchul kim, jonghan jin, youngjin kim, inyong park, yunseok kim, and seungwoo kim, high harmonic generation by resonant plasmon field enhancement, nature 453, 757760 2008 pdf download 3. Highorder harmonic generation driven by plasmonic fields. We ensure that this enhancement is away from plasmonic resonances, so that it. Plasmonenhanced highharmonic generation from silicon.
Surface plasmon resonance of gold nanoparticle arrays partially embedded in. High harmonic generation by resonant plasmon field enhancement. Enhanced thirdorder optical nonlinearity driven by surface. For example, if the antennas are resonant with a probing field that excites plasma oscillations, then the resulting local field will perturb the high harmonic generation process driven by a. Highharmonic generation by field enhanced femtosecond. Highharmonic and single attosecond pulse generation using. Conventionally hhg is based on the use of high power amplified femtosecond laser pulses, special. This nonlinear conversion process requires ultrashort pulse lasers of strong intensity. Surface plasmon resonance induced in a welldesigned nanostructure allows for intensity enhancement of the incident laser field more than 20 db. Herrmann, theory of plasmon enhanced high order harmonic generation in the vicinity of metal nanostructures in noble gases, phys. Here we argue that the large light intensity required for high harmonic generation to occur can be reached by exploiting localized plasmons in doped graphene nanostructures. Metallic nanocavityenhanced second harmonic generation. We estimate the enhancement at a specific depth below the surface, in a unit cell of the periodic.
High harmonic generation by resonant plasmon field enhancement kim, seungwoo, kim, seungchul, park, inyong, choi, joonhee. The nanoplasmonix project proposes to study euv light generation from mhz reprate lasers assisted by plasmonic resonances to achieve local enhancements of electric fields. Recently, various metallic nanoantennas have been proposed and demonstrated 16 to obtain such strong local fields or hotspots for biochemical sensing applications 6,7 and for boosting a wide range of nonlinear optics phenomena 8,9. An order of magnitude enhancement in thg is found at 2. Here we study third harmonic generation from quadrumers of silicon nanodisks supporting high quality collective modes associated with the magnetic fano resonance. Metallic nanocavityenhanced second harmonic generation from. In contrast to this general statement we show that high field enhancement does not necessarily lead to an optimized nonlinear activity. Enhanced thirdharmonic generation induced by nonlinear. Surface plasmons resonance within metallic nanostructures enables electric field enhancement of a low intensity femtosecond pulse laser, permitting high. Plasmon enhanced hhg has been reported from metallic antennas deposited on si10 and sapphire23. Selective highharmonic generation by charge transfer. Highharmonic generation by field enhanced femtosecond pulses.
Wang 1 1school of electrical engineering and computer science, oregon state univer sity, corvallis, or, 97331, usa. Da resonant at the fundamental, simulations show that the field enhancement in the gap at the fundamental is higher than in the case of the dra as can be seen in fig. The conversion efficiency of harmonics from chirped laser pulses was significantly improved by nearly three more orders of magnitude than that of chirpfree pulses, and. Kim, high order harmonic generation based on resonant plasmon field en hancement, in frontiers in optics 2008laser science xxivplasmonics and metamaterialsoptical fabrication and testing, osa technical digest cd optical society of america, 2008, paper ftubb2. We demonstrate that both the confinement of the electron motion and the inhomogeneous character of the laser electric field play an important role in the hhg process and lead to a significant increase of the harmonic cutoff. Thirdharmonic generation enhancement by filmcoupled. Jul 25, 2017 colloidal aucoreagshell nanorods with an asymmetric transverse crosssection and a strong octupolar plasmon resonance are synthesized by the controlled growth of ag shells on one side of the au cores. In particular, we demonstrate that second harmonic. Through the measurement of spectral and polarization characteristics, the nonlinearity enhancement is attributed to the locally intensified electric field of the surface plasmon polariton mode. On the quantumoptical nature of high harmonic generation. Resonant secondharmonic generation in a magnetized plasma.
A largely enhanced second harmonic generation shg from these asymmetric coreshell nanorods is demonstrated for the first time by tuning the dipolar and the octupolar plasmon modes to make. For reference, we measure fwm on a flat singlecrystalline au surface in the far field under normal incidence and backreflection detection. Boosting thirdharmonic generation by a mirrorenhanced. Being driven by the strong magnetic dipole resonance at the pump wavelength and a high quality mode at the harmonic wavelength, the efficient second harmonic. The enhancement of the incident field, combined with the large nonlinear conductivity of graphene, can dramatically increase the thg conversion efficiency by several orders of magnitude. Extremely large extinction efficiency and field enhancement in terahertz resonant dipole nanoantennas luca razzari,1, andrea toma,1 mostafa shalaby,2 matteo clerici,2 remo proietti zaccaria,1 carlo liberale,1 sergio marras,1 ibraheem a. This is achieved by exploiting the local field enhancement induced by resonant plasmons within a metallic.
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