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Characterization of temperature dependent operation of a GaInNAs-based RCEPD designed for 1.3 μm

Sarcan, F and Nordin, MS and Kuruoğlu, F and Erol, A and Vickers, AJ (2017) 'Characterization of temperature dependent operation of a GaInNAs-based RCEPD designed for 1.3 μm.' Superlattices and Microstructures, 102. 27 - 34. ISSN 0749-6036

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Abstract

We report the characteristics of the temperature dependent operation of a GaInNAs-based resonant-cavity-enhanced photodetector (RCEPD), designed to be operated at the dispersion minimum optical communication window of 1.3 μm. A Transfer-Matrix Method (TMM) was used to design the structure of the device. The absorption layer of the photodetector is comprised of nine 7 nm-thick Ga0.733In0.267N0.025As0.975(Sb)/GaN0.035As0.965 quantum wells, and 15 and 10 pairs of GaAs/AlAs distributed Bragg reflectors (DBRs) grown as the bottom and top mirrors, to form the cavity of the device. All electrical and optical measurements were carried out over a temperature range from 10 to 40 °C in order to investigate the characteristic of the device. The quantum efficiency is determined to be in the range of 16% (at 10 °C) and 31% (at 40 °C). An excellent wavelength selectivity is observed which changed from 3.7 nm (at 10 °C) to 5.4 nm (at 40 °C). The dark current of the device is measured as 11  nA at 10 °C and 19  nA at 40 °C without bias. The photocurrent at −0.5 V is measured to be 1.5 mA at 25 °C. The high dark current of the device is attributed to weak confinement of the electrons in GaInNAs QW surrounded by the strain-compensator GaNAs barrier layers. The temperature dependent cavity wavelength was analytically calculated and compared with that of experimental results. The temperature dependent linear shifts of the resonance wavelength (dλ/dT) is calculated as 0.077 nm/°C, which is in good agreement with the experimental result, 0.080 nm/°C. Our results reveal that the characteristics of a RCEPD, such as quantum efficiency, FWHM etc., are quite sensitive to temperature changes due to the temperature dependence of the refractive index of the DBRs.

Item Type: Article
Uncontrolled Keywords: RCEPD, Temperature dependency of RCEPD, Photodetector, GaInNAs, Temperature dependency of DBR, Distributed Bragg reflectors
Subjects: Q Science > QC Physics
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 07 Mar 2017 11:16
Last Modified: 19 Feb 2018 17:15
URI: http://repository.essex.ac.uk/id/eprint/18992

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