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Transmission-Type Pump-Probe ZnO/ ZnMgO MQW 365 to 385 nm Measured@20091026

Transmission-Type Pump-Probe ZnO/ ZnMgO MQW 365 to 385 nm Measured@20091026. 1. Construction 2. Absorption Spectrum 3. PL Spectrum. Optical Properties. ZnMgO MQW. PL (55K). Substrate (c-Al 2 O 3 ). MZO (15 min, ~21nm). ZnO (5 min, ~7nm 可能更小 ). 5 pair MgZnO/ZnO.

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Transmission-Type Pump-Probe ZnO/ ZnMgO MQW 365 to 385 nm Measured@20091026

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  1. Transmission-Type Pump-Probe ZnO/ZnMgO MQW 365 to 385 nm Measured@20091026

  2. 1. Construction 2. Absorption Spectrum 3. PL Spectrum Optical Properties

  3. ZnMgO MQW PL (55K) Substrate (c-Al2O3) MZO (15 min, ~21nm) ZnO (5 min, ~7nm 可能更小) 5 pair MgZnO/ZnO MgxZn1-xO, x=0.05

  4. Comparison of Exciton Dynamics1. ZnO thin film (70nm)2.MgZnO SQW3. MgZnO MQW

  5. Experimental Set Up

  6. Absorption Spectrum

  7. ZnO (70nm)@ 372.5nm Pr=0.5, PP=20mW 0.9ps 8.5ps 50ps

  8. ZnMgO SQW (1pair) Pr=0.5, PP=20mW y=y0+A1exp(t1)+A2exp(t2)+A3exp(t3)

  9. 372.5nm [Pr=0.5mW PP=20mW]

  10. 375nm [Pr=1mW PP=20mW] y=y0+A1exp(t1)+A2exp(t2)+A3exp(t3)

  11. ZnMgO MQW (5pairs) Pr=0.5, PP=20mW y=y0+A1exp(t1)+A2exp(t2) Substrate (c-Al2O3)

  12. Energy dependent Dynamics in MgZnO MQW1. above-band-gap2.near-band-gap3. below-band-gap

  13. y=y0+A1exp(t1)-A2exp(t2) 363 nm [Pr=0.5mW PP=10mW] y=y0+A1exp(t1)+A2exp(t2) 365 nm [Pr=0.5mW PP=10mW]

  14. 368 nm [Pr=0.5mW PP=10mW] T0= 63 mV y=y0+A1exp(t1)+A2exp(t2)

  15. 370nm [Pr=0.5mW PP=10mW] T0= 50 mV y=y0+A1exp(t1)+A2exp(t2)

  16. 373nm [Pr=0.5mW PP=10mW] T0= 36 mV y=y0+A1exp(t1)+A2exp(t2)

  17. 375nm [Pr=0.5mW PP=10mW] y=y0-A1exp(t1)-A2exp(t2)

  18. 377nm [Pr=0.5mW PP=10mW] T0= 320 mV y=y0-A1exp(t1)-A2exp(t2)

  19. 379nm [Pr=0.5mW PP=10mW] T0= 810 mV y=y0-A1exp(t1)

  20. 385nm [Pr=0.5mW PP=10mW] T0= 860 mV y=y0+A1exp(t1)

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