Presentation is loading. Please wait.

Presentation is loading. Please wait.

Nanophotonics Week 8 November 16, 2007 Rare earth and quantum dot emitters.

Similar presentations


Presentation on theme: "Nanophotonics Week 8 November 16, 2007 Rare earth and quantum dot emitters."— Presentation transcript:

1 Nanophotonics Week 8 November 16, 2007 Rare earth and quantum dot emitters

2 HHe LiBeB CNOFNe NaMgAlSiPSClAr KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe CsBaLaHfTaWReOsIrPtAuHgTlPbBiPoAtRn FrRaAcRfDbSgBhHsMtUunUuuUub CePrNdPmSmEuGdTbDyHo Er TmYbLu ThPaUNpPuAmCmBkCfEsFmMdNoLr La 3+ : [Xe] 4f n n=1-14 ….4f n 5s 2 5p 6 Optical doping with lanthanide ions

3 Energy levels of lanthanide ions 1.5 µm E gap (Si)

4

5 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

6 Europium protects the euro J.F. Suyver, A. Meijerink (UU )

7 Lanthanide bar codes Dejneka, PNAS 100, (2003)

8

9 HHe LiBeB CNOFNe NaMgAlSiPSClAr KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe CsBaLaHfTaWReOsIrPtAuHgTlPbBiPoAtRn FrRaAcRfDbSgBhHsMtUunUuuUub CePrNdPmSmEuGdTbDyHo Er TmYbLu ThPaUNpPuAmCmBkCfEsFmMdNoLr La 3+ : [Xe] 4f n n=1-14 ….4f n 5s 2 5p 6 Optical doping with lanthanide ions

10 Chemistry (outer-shell behavior) is similar A. Polman et al., Appl. Phys. Lett. 62, 507 (1993), J.S. Custer et al., J. Appl. Phys. 75, 2809 (1994) ErbiumPrasaeodymium

11 Silica optical fiber transmission spectrum Hz 1.3  m 1.55  m Miya et al., Electron. Lett. 15, 108 (1979) wavelength vs. time division multiplexing: WDM

12 Erbium transition at 1.5  m

13 Er absorption and emission cross sections absorption emission G.N. van den Hoven et al. Appl. Opt. 36, 3338 (1997)

14 Erbium photoluminescence in various silicate glasses W tot =W rad +C Er-Er  [Er]  [OH ] A. Polman, J. Appl. Phys. 82, 1 (1997)

15 EXAFS Local structure around Er in silicate glasses M.A. Marcus et al., J. of Non-Cryst. Solids 136, 260 (1991)

16 Planar optical waveguide Si high index low index Waveguide core materials: silica glass Al 2 O 3, Si 3 N 4, …. polymer silicon

17 Photonic integrated circuits on silicon 1 mm SiO 2 /Al 2 O 3 /SiO 2 /Si Al 2 O 3 technology by M.K. Smit et al., TUD

18 The world’s smallest erbium-doped optical amplifier 1.53  m signal, 1.48  m pump, 10 mW, gain: 2.3 dB Waveguide spiral size: 1 mm 2 minimum bending radius > 50  m Appl. Phys. Lett. 68, 1886 (1996)

19 From a FOM prototype to a 40 M$ company … Symmorphix Sunnyvale CA, USA

20 1.5 µm microcavity mode imaged through green upconversion 2 MeV Er implantation, 0.35 at.%, °C anneal T.J. Kippenberg et al.

21 Nanophotonics Week 8 November 16, 2007 Rare earth and quantum dot emitters

22 Indirect bandstructure Silicon is an inefficient light emitter

23 Si:Er light-emitting diode G. Franzó et al., Appl. Phys. Lett. 64, 2235 (1994), B. Zheng et al., Appl. Phys. Lett. 64, 2842 (1994) Er, O doped c-Si

24 5  m SiO keV Si, 1.7  cm -2 anneal: 1100  C  nanocrystals: 3-5 nm  Silicon quantum dots: particles in a box

25 X-ray Photo-electron spectroscopy

26 Luminescence spectrum depends on Si concentration red-shift for larger nanocrystal size 50 keV Si, 1100 o C/10 min, 500 eV D, 3  cm -2  E = meV Bulk Si bandgap 1100 nm

27 Si + O 2  Si + SiO 2 Shrinking Si quantum dots by oxidation: blue shift  E = meV

28 5 nm PbS: rock-salt structure Nearly spherical shape, crystal facets Compound semiconductor quantum dots: PbS Modified slide from D. Vanmaekelbergh

29 CdSe: wurtzite Modified slide from D. Vanmaekelbergh Compound semiconductor quantum dots: CdSe

30 Modified slide from D. Vanmaekelbergh Luminescence from compound semiconductor quantum dots

31 Class topics 1. Resonances and refractive index 2. Nanoparticle scattering 3. Surface plasmon polaritons 4. Ornstein Laboratory excursion 5. Photonic crystals 6. AMOLF lab tour 7. Local density of optical states 8. Rare earth ions and quantum dots 9. Microresonators 10. Philips excursion 11. NANONED Conference 12. Near field optics 13. Metamaterials 14. p.m. 15. Nanophotonics Student Symposium


Download ppt "Nanophotonics Week 8 November 16, 2007 Rare earth and quantum dot emitters."

Similar presentations


Ads by Google