Ion implanted photodiode detectors in epitaxial (Gax In<sub>1-x</sub>) As

P. K. Ajmera; J. R. Hauser

doi:10.1364/AO.14.002905

Applied Optics
Vol. 14,
Issue 12,
pp. 2905-2910
(1975)
•https://doi.org/10.1364/AO.14.002905

Ion implanted photodiode detectors in epitaxial (Ga_x In_1-x) As

P. K. Ajmera and J. R. Hauser

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P. K. Ajmera and J. R. Hauser, "Ion implanted photodiode detectors in epitaxial (Gax In_1-x) As," Appl. Opt. 14, 2905-2910 (1975)

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Abstract

Ion implanted p-n junction photodiodes in epitaxially grown (Ga_xIn_1-x) As material are reported on here. Photoresponse in these diodes was investigated for approximately the entire composition range of 0 < x < 1. High values for quantum efficiency were obtained for the devices with a high value of x. Peak $D_{λ, f}^{*}$ of greater than 10¹¹ [cm(Hz)^1/2/W] at room temperature was obtained at 0.8-μm wavelength, while a peak $D_{λ, f}^{*}$ of 5 × 10¹⁰ [cm(Hz)^1/2/W] was obtained at 165 K at 1.4-μm wavelength.

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Sample	Value of R_d from I–V curves at zero bias (Ω)		Expected increase in R_V,λ(R_L = 10⁷ Ω) $from \frac{R at 165 K}{R at room temp . for a constant value of η}$	Observed increase in the peak value of R_V,λ at 165 K

	Room temp.	165 K
x = 0.98	5.25 × 10⁸	Too high to measure	1.02	0.81
x = 0.34	7.5 × 10⁴	1.08 × 10⁷	69.8	35.06
x = 0.13	132.78	1.43 × 10⁴	107.5	96.4

Device	Temp.	Frequency kHz	Device resistance R_d (Ω)	Observed noise

				(4kTR)^1/2
x = 0.98	Room	1.56	5.25 × 10⁸	2.3
x = 0.34	Room	2	7.5 × 10⁴	1.03
	165 K	2	1.08 × 10⁷	2.27
x = 0.13	Room	1.56	132.8	Limited by the amplifier noise
	165 K	1.56	1.43 × 10⁴	1.04

Sample	Value of R_d from I–V curves at zero bias (Ω)		Expected increase in R_V,λ(R_L = 10⁷ Ω) $from \frac{R at 165 K}{R at room temp . for a constant value of η}$	Observed increase in the peak value of R_V,λ at 165 K

	Room temp.	165 K
x = 0.98	5.25 × 10⁸	Too high to measure	1.02	0.81
x = 0.34	7.5 × 10⁴	1.08 × 10⁷	69.8	35.06
x = 0.13	132.78	1.43 × 10⁴	107.5	96.4

Device	Temp.	Frequency kHz	Device resistance R_d (Ω)	Observed noise

				(4kTR)^1/2
x = 0.98	Room	1.56	5.25 × 10⁸	2.3
x = 0.34	Room	2	7.5 × 10⁴	1.03
	165 K	2	1.08 × 10⁷	2.27
x = 0.13	Room	1.56	132.8	Limited by the amplifier noise
	165 K	1.56	1.43 × 10⁴	1.04

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