Abstract
Photoresponse of GaAs-based double heterojunction phototransistors (DHPTs), in surface-illuminated orientation, has been analyzed with a modified small-signal model. The effect of incident optical illumination on various intrinsic parameters has been discussed for In0.49Ga0.51P/GaAs N+p+N- DHPT. Since the primary detecting material is GaAs, the device is optimized to detect short wavelength at 850nm. A novel formulation for optical flux absorption in DHPTs is also provided along with its comparison with single-HPTs. The analysis of DHPTs presented in this work can be utilized for performance enhancement through device optimization in sensors, photoreceivers in optical networks and remote sensing applications employing integrated circuits.
| Original language | English |
|---|---|
| Article number | JQE-133839-2014 |
| Pages (from-to) | 1044-1051 |
| Number of pages | 7 |
| Journal | I E E E Journal of Quantum Electronics |
| Volume | 50 |
| DOIs | |
| Publication status | Published - 4 Dec 2014 |
Keywords
- Phototransistors, Double-heterojunction, Modeling, frequency response, small signal model.