Abstract
We observed distinct bandwidth degradation behaviors in low-temperature-grown GaAs (LTG-GaAs)-based traveling-wave photodetectors (PDs) under ∼1300-nm telecommunication wavelength operation. Compared with the bandwidth degradation behaviors of different excitation wavelengths (∼800 and ∼1550 nm) in LTG-GaAs-based PDs, the saturation behaviors at the studied wavelength are more serious and can be attributed to "hot electron" effect of photogenerated carriers. The disclosed unique material properties of LTG-GaAs are important for its applications in ultrafast optoelectronics and understanding its carrier dynamics with the defect states.
| Original language | English |
|---|---|
| Pages (from-to) | 242-244 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 16 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2004 |
Keywords
- Bandwidth saturation
- Metal-semiconductor-metal (MSM) devices
- Photodetector
- Traveling wave devices
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