Abstract
We report on picosecond pulsed response and 3-dB cutoff frequency of 1.3-μm GaNAsSb unitraveling-carrier photodetectors (PDs) grown by molecular beam epitaxy using a radiofrequency plasma-assisted nitrogen source. The 0.1-μm-thick GaNAsSb photoabsorption layer contains 3.5% of N and 9% of Sb, resulting in a bandgap of 0.88 eV. The dark current densities at 0 and .9 V are 6 and 34 mA/cm2, respectively. The GaNAsSb UTC PDs exhibit a temporal response width of 46 ps and a record 3-dB cutoff frequency of 14 GHz at -9 V.
Original language | English (US) |
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Pages (from-to) | 590-592 |
Number of pages | 3 |
Journal | IEEE Electron Device Letters |
Volume | 30 |
Issue number | 6 |
DOIs | |
State | Published - 2009 |
Keywords
- 1.3-μm PDs
- Dilute-nitride-based photodetectors (PDs)
- GaNAsSb
- Molecular beam epitaxy (MBE)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering