Time resolved imaging of carrier and thermal transport in silicon

Hurley, David H.; Wright, Oliver B.; Matsuda, Osamu; Shindé, Subhash L.

doi:10.1063/1.3272827

Cited by 23 publications

(19 citation statements)

References 36 publications

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“…The decay of the pump-probe antenna modulation is governed by cooling of the heated area on a time scale of ∼250 ps [40]. The high repetition frequency of our setup results in a stationary background temperature over a larger, micrometer-sized area [41], which provides the pure ITO signal in Figs. 1 and 2.…”

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confidence: 99%

All-Optical Control of a Single Plasmonic Nanoantenna–ITO Hybrid

et al. 2011

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We demonstrate experimentally picosecond all-optical control of a single plasmonic nanoantenna embedded in indium tin oxide (ITO). We identify a picosecond response of the antenna-ITO hybrid system, which is distinctly different from transient bleaching observed for gold antennas on a nonconducting SiO 2 substrate. Our experimental results can be explained by the large free-carrier nonlinearity of ITO, which is enhanced by plasmon-induced hot-electron injection from the gold nanoantenna into the conductive oxide. The combination of tuneable antenna-ITO hybrids with nanoscale plasmonic energy transfer mechanisms, as demonstrated here, opens a path for new ultrafast devices to produce nanoplasmonic switching and control.Keywords: active, plasmonic, nanoantenna, hybrid nanostructures, nanophotonics Nanophotonic devices that can efficiently concentrate optical radiation into a nanometer-sized volume are of great interest for many applications in integrated and nonlinear photonics, radiative decay engineering, and quantum information processing. In plasmonics, ultrasmall mode volumes and high local field enhancement are achieved by exploiting the surface plasmon resonances of metal nanostructures. Analogous to radiowave antennas, plasmonic nanoantennas have been developed, providing a high local field enhancement with efficient coupling to far field radiation [1,2]. Active control of the resonance spectrum of a plasmonic nanoantenna is a crucial step toward achieving transistor-type nanodevices for manipulation of the flow and emission of light. Such active nanoplasmonic devices may hold promise for on-chip integration of optical and electronic functionalities [3,4]. A variety of schemes have been proposed and developed to control plasmonic modes using optical, electrical, magnetic, thermal, or mechanical means [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. While propagating surface plasmon polaritons provide a long interaction length, allowing switching at modest intensities [9][10][11][12][13], localized mode switching may benefit from the design of nanoplasmonic modes with strong local field enhancement and high sensitivity to refractive index changes [14][15][16][17][18][19][20]. Large modulation has been obtained recently for plasmonic nanoantennas using an electrically-controlled liquid crystal [18,19]. While liquid crystals provide sizeable tuning of the antenna response, the temporal response is too slow for many applications. Furthermore, a solid-state implementation would be favorable for onchip integration of nanoplasmonic devices.Here, we demonstrate all-optical control of plasmon modes of individual nanoantennas using the nonlinear response of a nanoantenna-ITO hybrid. Transparent conductive oxides have recently been identified as promising materials for plasmonics and transformation optics applications in the near-infrared [21]. Unity-order changes of the refractive index of indium tin oxide (ITO) above its bulk plasmon frequency have been demonstrated using voltage-controlled nanoscale space ...

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confidence: 99%

All-Optical Control of a Single Plasmonic Nanoantenna–ITO Hybrid

et al. 2011

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“…A similar design of the scanning system used with the 4f confocal setup makes use of two motorized linear stages instead of the biaxial rotation stage [43]. This system is somewhat easier to align than the setup described above.…”

Section: Scanning Systemmentioning

confidence: 97%

Optical Characterization of Phononic Crystals in the Time Domain

Matsuda

Wright

2016

Phononic Crystals

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“…Lateral scanning is achieved through an optical two-lens lever. 37 Small changes in reflectivity of the probe beam DR/R ranging from 10 À5 to 10 À3 are measured using lock-in amplification of the photodiode voltage signal. We also present a few examples that use a modified version of this setup.…”

Section: Methodsmentioning

confidence: 99%

Investigation of thermal transport in composites and ion beam irradiated materials for nuclear energy applications

et al. 2016

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Thermal transport in materials used for energy applications is a physical process directly tied to performance and reliability. As a result, a great deal of effort has been devoted to understanding thermal transport in materials whose ability to conduct heat is critical. Here, our objective is to discuss the utility of laser-based thermoreflectance (TR) approaches that provide microscale measurement of thermal transport. We provide several examples that implement the TR technique to investigate thermal transport in materials used in nuclear energy applications. First, we discuss utility of this technique to measure thermal conductivity in ion irradiated ceramic materials during investigations where the primary objective is to understand the impact of radiation induced crystalline structure defects on thermal transport. We also present the capability of TR approach to resolve thermal conductivity of each layer in tristructural isotropic fuel, silicon carbide fiber composites, and 2nd phase precipitates in uranium silicide. Finally, the ability to measure interface thermal resistance between adjacent layers in composites is demonstrated.

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Time resolved imaging of carrier and thermal transport in silicon

Cited by 23 publications

References 36 publications

All-Optical Control of a Single Plasmonic Nanoantenna–ITO Hybrid

All-Optical Control of a Single Plasmonic Nanoantenna–ITO Hybrid

Optical Characterization of Phononic Crystals in the Time Domain

Investigation of thermal transport in composites and ion beam irradiated materials for nuclear energy applications

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