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

2. outline acoustoelectrics acoustooptics fibres and hybrids

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

4. Surface Acoustic Waves and Semiconductor Nanostructures: the electronic part

5. Acoustoelectric Current Device (SET-SAW) 3 m3 m 100 nm RF Drive of Frequency f Current = e·f Gate Voltage

6. Current Plateaus

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

8. Interaction of SAW and Impurity dot Vgate RF Amplitude -30 dBm0 dBm PRB 68, 245310, (2003)

9. charging energy of a conductor: E C = e 2 /C  Coulomb blockade E C = e 2 /C >> k B T R T >> h/2e 2 zero-dimensional electronic system: energy quantisation :  total energy: Δ E = E N+1 - E N = Δ  + E C EFEF ΔEΔE Semiconductor quantum dots

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

11. Acoustic turnstile device Vgate RF Amplitude -30 dBm0 dBm a) b) 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) I = e·f 1m1m

14. SAW and GaN nanowires Nanotechnology 19, 275708 (08) 400 nm SiO 2 / Au GaN

15. Surface Acoustic Waves and Semiconductor Nanostructures: the optic part

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

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

18. ZnCdSe/LiNbO3- Hybrid Epi-Liftoff of ZnCdSe-QW onto LiNbO 3 substrate

19. Finally... Organic nanofibres and new stuff

20. Growth of Carbon Nanosticks Laser ablation of carbon leads self-organisation of 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 Post-Growth cleaning with Trimethylpentane Growth on prestructured metal electrodes