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Depletion Sample I-V, PL & PLE. Toshiyuki Ihara ’04 07/13. Sample information. n-type-doped single wire 5_7_04.1(accumulation) 5_7_04.2 (depletion). Red : new. I measured I-V, PL & PLE of sample 5_7_04.2 #3 depletion sample. I-V measurement. Sample 5_7_04.2 #3 (depletion)

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Depletion sample i v pl ple

Depletion Sample I-V, PL & PLE

Toshiyuki Ihara

’04 07/13


Sample information
Sample information

  • n-type-doped single wire

    5_7_04.1(accumulation) 5_7_04.2 (depletion)

Red : new

I measured I-V, PL & PLE of sample 5_7_04.2 #3 depletion sample


I v measurement
I-V measurement

  • Sample 5_7_04.2 #3 (depletion)

  • Gate-earth I-V

  • No leak current

    between ー0.6~0.3

    though I observed

    ohmic I-V at 300K

5K

300K


Wire pl vg dependence
Wire PL Vg dependence

Wire PL spectra Vg dependence between

-0.8V~0.2V

Laser 1μW

stem excitation(1.665eV)

Reflection geometry

Almost same result as before

wire

arm

plasma

X-

X


Pl scan sample quality
PL scan ~ sample quality

0 - 50μm

(1μm step)

Vg : -0.3V or

-0.65V

Laser 1μW

stem excitation

(1.665eV)

Reflection geometry

ML fluctuations or electron density fluctuations !?

-0.3V

-0.65V

wire

wire

arm

arm


Wire pl ple vg dependence
Wire PL & PLE Vg dependence

Wire normalized PL & PLE spectra

Laser / detection : perpendicular

polarization

Excitation : ⊥ to wire

Detection : // to wire

Almost same result as before

laser

plasma

trion


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