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Semiconductor Nanostructure Acoustodynamics

Semiconductor Nanostructure Acoustodynamics. Jens Ebbecke. Linz 25/06/09. outline. fibres and hybrids. acoustoelectrics. acoustooptics. surface acoustic waves. one kind of solutions: surface acoustic waves first investigated in 1885 by Lord Rayleigh for earth quakes. nanostructure.

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Semiconductor Nanostructure Acoustodynamics

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  1. Semiconductor Nanostructure Acoustodynamics Jens Ebbecke Linz 25/06/09

  2. outline fibres and hybrids acoustoelectrics acoustooptics

  3. surface acoustic waves one kind of solutions: surface acoustic wavesfirst investigated in 1885 by Lord Rayleigh for earth quakes nanostructure GaAs f = cSAW / p

  4. Surface Acoustic Waves andSemiconductor Nanostructures: the electronic part

  5. Gate Voltage RF Drive of Frequency f 3mm 100 nm Current = e·f Acoustoelectric Current Device(SET-SAW)

  6. 5 f = 3.58 GHz P = 16 dBm 4 T = 1.7 K 3 Current / nA 2 1 I = e f . 0 -2.2 -2.1 -2.0 -1.9 Gate Voltage / V Current Plateaus

  7. RF Amplitude Vgate 2D data I=ef I=2ef Vgate I=3ef RF Amplitude

  8. Interaction of SAW and Impurity dot PRB 68, 245310, (2003) Vgate RF Amplitude -30 dBm 0 dBm

  9. Semiconductor quantum dots EF ΔE charging energy of a conductor: EC = e2/C  Coulomb blockade zero-dimensional electronic system: energy quantisation :  total energy: EC = e2/C >> kBT RT >> h/2e2 ΔE =EN+1 - EN = Δ + EC

  10. . . f 3 e = I . . Curr. / nA e f = 2 I . . f e 1 I = I = 1·e·f × × I = 1 e f RF Amplitude quantized current through a static quantum dot APL 84, 4319 (2004) I = e·f

  11. Vgate b) a) RF Amplitude -30 dBm 0 dBm Acoustic turnstile device a)

  12. Exciting: an Archimedian screw for electrons PRB 72, 121311(R) 2005 (picture taken from Science,304, 1079 (2004)„Highlights of the recent literature“)

  13. Charge pumping in Carbon Nanotubes New J. of Phys. 9, 73 (07)PRB 70, 233401 (04) 1m I = e·f

  14. SAW and GaN nanowires Nanotechnology19 , 275708 (08) 400 nm GaN SiO2 / Au

  15. Surface Acoustic Waves andSemiconductor Nanostructures: the optic part

  16. Single photon source by bipolar charge transport GaAs-Quantumwell GaAlAs GaAs

  17. Single photon source by bipolar charge transport PRB 74, 035407 (06)

  18. ZnCdSe/LiNbO3- Hybrid Epi-Liftoff of ZnCdSe-QWonto LiNbO3 substrate

  19. Finally... Organic nanofibres and new stuff

  20. Growth of Carbon Nanosticks Laser ablation of carbon leads self-organisationof carbon nanosticks-> Pyroelectric effects responsible for nanostick growth -> organic nanowire son LiNbO3

  21. p6P nanofibres on LiNbO3 Standard white LiNbO3 Black LiNbO3

  22. p6P nanofibres on LiNbO3 5 µm 5 µm Post-Growth cleaning withTrimethylpentane Growth on prestructuredmetal electrodes

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