Ultrafast All-Optical Switching via Subdiffractional Photonic Nanojets and Select Semiconductor Nanoparticles

Born, Brandon; Geoffroy-Gagnon, Simon; Krupa, Jeffrey D. A.; Hristovski, Ilija R.; Collier, Christopher M.; Holzman, Jonathan F.

doi:10.1021/acsphotonics.6b00182

Cited by 34 publications

(22 citation statements)

References 43 publications

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“…It has been reported that the threshold control energy for metamaterial switching reaches 3 nJ and that for SiGeC waveguide switching arrives at 22 pJ . The lowest threshold control energies are achieved by microring resonators (720 fJ) and by photonic nanojets with semiconductor nanoparticles (300 fJ). The result presented here is, in theory, about eight orders of magnitude lower than the previously reported results.…”

Section: Extraordinary Switching Propertiesmentioning

confidence: 99%

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Theoretical Design of a Pump‐Free Ultrahigh Efficiency All‐Optical Switching Based on a Defect Ring Optical Waveguide Network

Yang

2019

Annalen der Physik

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A theoretical design of a defect ring optical waveguide network is proposed to construct a pump-free ultrahigh efficiency all-optical switch. This switch creates ultrastrong photonic localization and causes the nonlinear dielectric in the defect waveguide to intensely respond. At its ON state, this material defect without Kerr response helps to produce a pair of sharp pass bands in the transmission spectrum to form the dual channel of the all-optical switch. When it is switched to its OFF state, the strong Kerr response induced refractive index change in the high nonlinear defect waveguide strongly alters the spectrum, leading to a collapse of the dual channels. Network equation and generalized eigenfunction method are used to numerically calculate the optical properties of the switch and obtain a threshold control energy of about 2.90 zJ, which is eight orders of magnitude lower than previously reported. The switching efficiency/transmission ratio exceeds 3×10 11 , which is six orders of magnitude larger than previously reported. The state transition time is nearly 108 fs, which is approximately two orders of magnitude faster than the previously reported shortest time. Furthermore, the switch size can be much smaller than 2.6 µm and will be suitable for integration.

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Section: Extraordinary Switching Propertiesmentioning

confidence: 99%

“…Recent progress and achievements in nonlinear optical materials have accelerated investigations and improvements of all‐optical switching . Resembling electronic counterparts, all‐optical switches are central to all‐optical computational systems .…”

Section: Introductionmentioning

confidence: 99%

Theoretical Design of a Pump‐Free Ultrahigh Efficiency All‐Optical Switching Based on a Defect Ring Optical Waveguide Network

Yang

2019

Annalen der Physik

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“…[4][5][6] At the same time, CuO has recently been shown to exhibit ultrafast relaxation and recombination dynamics, which can support its use in all-optical switching. 7 However, an adequate understanding of its optical absorption characteristics and subsequent ultrafast charge-carrier dynamics has proven to be challenging.…”

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confidence: 99%

Ultrafast Charge-Carrier Dynamics of Copper Oxide Nanocrystals

et al. 2016

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In this work, a detailed investigation is carried out on copper oxide, in the form of cupric oxide (CuO) nanocrystals. Particular attention is paid to the bandstructure and ultrafast charge-carrier dynamics. Transient absorption spectroscopy is carried out with an above-bandgap pump beam and below-bandgap probe beam to glean insight on the relaxation and recombination dynamics of the CuO nanocrystals at various pump fluences. Three time constants are apparent. The first time constant varies with pump fluence from 330 fs to 630 fs, and it is attributed to momentum relaxation via carrier-carrier scattering in the valence band as well as exciton-exciton annihilation. The second time constant is constant at 2 ps, and it is attributed to energy relaxation via carrier-phonon scattering within the valence band. The third time constant is constant at 50 ps, and it is attributed to trapping and recombination, due to the high density of trap states within the CuO nanocrystals. Such findings lay the foundation for future studies and applications of the emerging CuO material system.

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“…Similar all-optical switching arrangements are based on Mach-Zehnder interferometry [101,102]. Other schemes make use of semiconductor nanoparticles [103][104][105], nanoplasmonic waveguides [106][107][108][109], fiber Bragg gratings [110][111][112] or nanocavities in photonic crystals to strongly enhance optical nonlinearities [113,114]. Moreover, based on irradiation of rubidium vapor, there is a development that uses counter-propagating laser beams to induce an optical pattern that rotates on application of a switching laser [115].…”

Section: Discussionmentioning

confidence: 99%

Off-Resonance Control and All-Optical Switching: Expanded Dimensions in Nonlinear Optics

Forbes

Andrews

2019

Applied Sciences

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The theory of non-resonant optical processes with intrinsic optical nonlinearity, such as harmonic generation, has been widely understood since the advent of the laser. In general, such effects involve multiphoton interactions that change the population of each input optical mode or modes. However, nonlinear effects can also arise through the input of an off-resonant laser beam that itself emerges unchanged. Many such effects have been largely overlooked. Using a quantum electrodynamical framework, this review provides detail on such optically nonlinear mechanisms that allow for a controlled increase or decrease in the intensity of linear absorption and fluorescence and in the efficiency of resonance energy transfer. The rate modifications responsible for these effects were achieved by the simultaneous application of an off-resonant beam with a moderate intensity, acting in a sense as an optical catalyst, conferring a new dimension of optical nonlinearity upon photoactive materials. It is shown that, in certain configurations, these mechanisms provide the basis for all-optical switching, i.e., the control of light-by-light, including an optical transistor scheme. The conclusion outlines other recently proposed all-optical switching systems.

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Ultrafast All-Optical Switching via Subdiffractional Photonic Nanojets and Select Semiconductor Nanoparticles

Cited by 34 publications

References 43 publications

Theoretical Design of a Pump‐Free Ultrahigh Efficiency All‐Optical Switching Based on a Defect Ring Optical Waveguide Network

Theoretical Design of a Pump‐Free Ultrahigh Efficiency All‐Optical Switching Based on a Defect Ring Optical Waveguide Network

Ultrafast Charge-Carrier Dynamics of Copper Oxide Nanocrystals

Off-Resonance Control and All-Optical Switching: Expanded Dimensions in Nonlinear Optics

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