Single Nanowire Optical Correlator

Yu, Hua; Fang, Wei; Wu, Xiaoqin; Lin, Xing; Tong, Limin; Liu, Weitao; Wang, Aimin; Shen, Y. R.

doi:10.1021/nl5010477

Cited by 64 publications

(67 citation statements)

References 26 publications

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“…Briefly, two series of pulses are injected from each end of the NW and counter propagate in it. By tuning the delay line, pulses from opposite directions collide within the NW814. As required by phase-matching conditions, the nonlinear optical emission will be generated transversely as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The usage of nanomaterial based FROG (nano-FROG) would relieve the phase-matching condition, and provide an avenue to monitor the nano-domain distortions in near field891011. Exsiting nano-FROG methods, either via randomly dispersed nanoparticles or via nanoparticles attached to fiber taper, their FROG signal collections still rely on free-space optics.…”

mentioning

confidence: 99%

“…Besides, the variation and irregularity of the nanomaterials make them improbable to reproduce a consistent result among different measurements. More recently, transverse frequency conversion in semiconductor nanowires has been attracted lots of attentions because of its high conversion efficiency and low divergence angle8121314; although the feasibility of pulse measurement has been discussed, however, using this scheme to perform FROG measurement and retrieval of ultrashort and broadband pulses have not been reported yet. In this paper, we demonstrate a waveguide based FROG method with single nanowire (NW) as NLO material, through which the phase and amplitude of pulses are measured.…”

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confidence: 99%

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Frequency-resolved optical gating measurement of ultrashort pulses by using single nanowire

Feng

et al. 2016

Sci Rep

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The use of ultrashort pulses for fundamental studies and applications has been increasing rapidly in the past decades. Along with the development of ultrashort lasers, exploring new pulse diagnositic approaches with higher signal-to-noise ratio have attracted great scientific and technological interests. In this work, we demonstrate a simple technique of ultrashort pulses characterization with a single semiconductor nanowire. By performing a frequency-resolved optical gating method with a ZnO nanowire coupled to tapered optical microfibers, the phase and amplitude of a pulse series are extracted. The generated signals from the transverse frequency conversion process can be spatially distinguished from the input, so the signal-to-noise ratio is improved and permits lower energy pulses to be identified. Besides, since the nanometer scale of the nonlinear medium provides relaxed phase-matching constraints, a measurement of 300-nm-wide supercontinuum pulses is achieved. This system is highly compatible with standard optical fiber systems, and shows a great potential for applications such as on-chip optical communication.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Frequency-resolved optical gating measurement of ultrashort pulses by using single nanowire

Feng

et al. 2016

Sci Rep

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“…Fortunately, one-dimensional (1D) semiconductor nanostructures, are not only promising building blocks in assembling compact optical elements, but also the bridging of the nanoscopic and macroscopic world, for their unique optical properties and high-aspect-ratio [31][32][33][34][35][36]. Comparing with other dimensional nanostructures such as quantum dot and thin film, 1D semiconductor nanostructure (nanowires/nanoribbons) is easier to be manipulated and can offer a more excellent platform for tight confining and guiding light at sub-wavelength scale in one dimension, because they can confine photons in two dimensions and let the light propagate freely in the third dimension [37][38][39][40]. CdS nanoribbon is an optimal waveguide cavity for its rectangular cross section with a well-defined geometry, relatively high refractive index and flat surface [41].…”

Section: Introductionmentioning

confidence: 99%

Optical waveguide beam splitters based on hybrid metal–dielectric–semiconductor nanostructures

Liang

Zhou

et al. 2015

Optics Communications

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Optical waveguide beam splitter Surface plasmons Interference Light spot Numerical simulation a b s t r a c t Miniature integration is desirable for the future photonics circuit. Low-dimensional semiconductor and metal nanostructures is the potential building blocks in compact photonic circuits for their unique electronic and optical properties. In this work, a hybrid metal-dielectric-semiconductor nanostructure is designed and fabricated to realizing a nano-scale optical waveguide beam splitter, which is constructed with the sandwiched structure of a single CdS nanoribbon/HfO 2 thin film/Au nanodisk arrays. Microoptical investigations reveal that the guided light outputting at the terminal end of the CdS ribbon is well separated into several light spots. Numerical simulations further demonstrate that the beam splitting mechanism is attributed to the strong electromagnetic coupling between the Au nanodisks and light guided in the nanoribbon. The number of the split beams (light spots) at the terminal end of the nanoribbon is mainly determined by the number of the Au nanodisk rows, as well as the distance of the blank region between the nanodisks array and the end of the CdS ribbon, owing to the interference between the split beams. These optical beam splitters may find potential applications in high-density integrated photonic circuits and systems.

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“…The optical properties of such CdS nanostructures, including photoluminescence, absorption, and lasing, have been well studied [4][5][6][7][8][9][10][11][12] . Benefiting from their large second-order nonlinear response, CdS nanowires have been proven to be very useful in efficiently realizing nonlinear optical effects, such as optical correlation [13] and nonlinear optical mixing [14] . Also, the optical limiting properties of CdS nanowires were reported recently [15] .…”

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confidence: 99%

Resonant and nonresonant second-harmonic generation in a single cadmium sulfide nanowire

Huang

Dai

et al. 2017

中国光学快报

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We experimentally investigate the resonant and nonresonant second-harmonic generation in a single cadmium sulfide (CdS) nanowire. The second-order susceptibility tensor is determined by analyzing the forward secondharmonic signals of the CdS nanowire. Our results show that (1) d 33 ∕d 31 ¼ −2.5 at a nonresonant input wavelength of 1050 nm; (2) d 33 ∕d 31 ¼ −1.9 at a resonant wavelength of 740 nm. The difference can be attributed to the polarization-dependent resonance.OCIS codes: 190.2620, 190.4720. doi: 10.3788/COL201715.061901.Cadmium sulfide (CdS) nanocrystals have been attracting considerable attention due to its excellent optical and electronic properties. It is a member of wide direct band gap (∼2.4 eV) semiconducting compounds and possesses large optical nonlinearities, which make it extensively useful in linear and nonlinear optoelectronic devices. In the past several years, many researchers have synthesized different CdS nanostructures, such as nanoparticles, nanoribbons, and nanowires through various growth methods [1][2][3][4][5][6][7][8] . The optical properties of such CdS nanostructures, including photoluminescence, absorption, and lasing, have been well studied [4][5][6][7][8][9][10][11][12] . Benefiting from their large second-order nonlinear response, CdS nanowires have been proven to be very useful in efficiently realizing nonlinear optical effects, such as optical correlation [13] and nonlinear optical mixing [14] . Also, the optical limiting properties of CdS nanowires were reported recently [15] . However, the secondorder nonlinear susceptibilities of a single CdS nanowire have not been well investigated.Second-harmonic (SH) generation arises from the second-order nonlinear polarization in a nonlinear optical crystal [16][17][18][19] . By investigating the dependence of the SH intensities on the excitation polarizations, the secondorder nonlinear susceptibility of a single CdS nanowire can be determined [20][21][22][23][24][25] . The generated SH waves from such nanowires can be analyzed by using near-field scanning optical microscopy [26] or far-field microscopic imaging [27] . Both methods are based on the detection of the back-reflected SH signal. Compared to the forward SH emission, the back-irradiated SH emission has a much shorter coherence length and a much lower intensity, which will reduce the quality of the SH signals and the measurement accuracy. In this work, we utilize a forward SH scattering method [28,29] , which is ideal for characterizing nanostructures with similar sizes to the wavelengths involved, to characterize the second-order susceptibility tensors of single CdS nanowires. In addition, it has been reported that the second-order nonlinear optical response of a nanowire can be significantly influenced by the resonant excitation (i.e., the SH photon energy is above the bandgap of the semiconductor nanowire) [30,31]

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Single Nanowire Optical Correlator

Cited by 64 publications

References 26 publications

Frequency-resolved optical gating measurement of ultrashort pulses by using single nanowire

Frequency-resolved optical gating measurement of ultrashort pulses by using single nanowire

Optical waveguide beam splitters based on hybrid metal–dielectric–semiconductor nanostructures

Resonant and nonresonant second-harmonic generation in a single cadmium sulfide nanowire

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