在多量子阱红外探测器外延材料制备中,由于器件响应波长对量子阱的阱宽和垒高变化敏感,因此对外延材料的制备有很高的要求.本文中我们利用光致荧光谱(PL)对GaAs/AIGaAs多量子阱红外探测器材料进行了测量和计算,从而在器件工艺前,快速确定器件的探测波长.以光致荧光光谱对GaAs/AIGaAs多量子阱红外探测器材料进行测试,通过理论计算,得到多量子阱红外探测器探测波长.计算得到的理论响应波长与实际器件的响应波长有良好的一致性,证明用光荧光谱对外延材料进行测量并计算,能够更加有效地开展器件研究工作.同时,我们在低温下测量了外加偏压下器件暗电流情况,以及液氮温度下,500K黑体辐射情况时,信号噪声比达到235.3.
参考文献
| [1] | Levine B F .Quantum-well infrared photodetectors[J].Journal of Applied Physics,1993,74:R1-R81. |
| [2] | Bethea C G;l evine B F .Long wavelength infrared 128 ×128 AlxGa1-x As/GaAs quantum well infrared camera and imaging system[J].IEEE Transactions on Electron Devices,1993,40:1957-1963. |
| [3] | Gunapala S.D.;Liu J.K. .9-/spl mu/m cutoff 256/spl times/256 GaAs/Al/sub x/Ga/sub 1-x/As quantum well infrared photodetector hand-held camera[J].IEEE Transactions on Electron Devices,1997(1):51-57. |
| [4] | Gunapala SD.;Singh A.;Liu JK.;Rafol SB.;Luong EM.;Mumolo JM.;Tran NQ.;Ting DZY.;Vincent JD.;Shott CA.;Long J.;LeVan PD.;Bandara SV. .640 x 486 long-wavelength two-color GaAs/AlGaAs quantum well infrared photodetector (QWIP) focal plane array camera[J].IEEE Transactions on Electron Devices,2000(5):963-971. |
| [5] | Gunapala S D et al.Demonstration of 640×512 pixels lung-wavelength infrared (LWIR) quantum dot infrared photodetector (QDIP) imaging focal plane array[J].Infrared Physics & Technology,2007,50:149-155. |
| [6] | Jhahvala M et al.Development of a IK x 1K,8-12μm QWIP array[J].Infrared Physics & Technology,2007,50:234-239. |
| [7] | Liu W;Zhang DH;Fan WJ .Modeling of intersubband transitions in quantum well infrared photodetectors with complex potential profiles[J].Optical and Quantum Electronics,2006(12/14):1101-1106. |
| [8] | A JOY;K GHATAK et al.Numerical analysis of planar optical waveguides using matrix approach[J].Journal of Lightwave Technology,1987,5:660-667. |
| [9] | Andrews S R et al.Experimental and theoretical studies of the performance of quantum-well infrared phhotodetectors[J].Journal of Applied Physics,1991,70:993-1003. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%