Electrical crosstalk suppression for mesa-based in-device passivated InGaAs photodetectors

Inclusion of an in-device passivation layer in mesa-based lattice-matched InGaAs photodetectors provides a lower dark current than the conventional mesa type structures. However, due to the high electric field in the passivation layer between the pixels, improved dark current characteristics come with increased electrical crosstalk. Manipulating the electrical field distribution with an additional thin epilayer promises to reduce this inter-pixel carrier collection without disturbing the primary aim of the passivation layer, which is to reduce the dark current through the depleted condition. An experimental-like scanning demonstration with a five-pixel mini array numerically shows a significant decrease in electrical crosstalk together with an increase in photo-response.


Crosstalk Analysis for Mesa-based In-device Passivated InGaAs Photodetectors
Çırçır, Kübra; Kocaman, Serdar (2022-01-01)
Electrical crosstalk of in-device passivated mesa-based InGaAs photodetectors has been analyzed by a three-pixel mini array illuminated from the backside. In-device passivation of mesa-based lattice-matched InGaAs photodetectors significantly suppresses the surface-related component of dark current-however, inter-pixel crosstalk increases due to the depletion condition of the in-device passivation layer between the pixels. The inter-pixel crosstalk originates mainly from the high electric field in the in-de...
Frequency dependence of the constitutive parameters of causal perfectly matched anisotropic absorbers
Kuzuoğlu, Mustafa (1996-12-01)
Perfectly matched layers (PML's), which are employed for mesh truncation in the finite-difference time-domain (FDTD) or in finite element methods (FEM's), can be realized by artificial anisotropic materials with properly chosen permittivity and permeability tensors. The tensor constitutive parameters must satisfy the Kramers-Kronig relationships, so that the law of causality holds. These relations are used to relate the real and imaginary parts of the constitutive parameters of the PML media to deduce the a...
Nonlinear Vibrations of a Flexible L-shaped Beam Using Differential Quadrature Method
Samandari, Hamed; Ciğeroğlu, Ender (2015-02-05)
Flexible L-shaped beams are integrated sub-components of several navy and space structures where overall response of the system is affected by these structures. Hence, an understanding of the dynamical properties of these structural systems is required for their design and control. Recent studies show that the dynamic response of beam like structures undergoing large deformation is nonlinear in nature where phenomenon such as jump and chaotic response can be detected. In this study, nonlinear free vibratio...
Damage diagnosis in frame structures with a dynamic response method
Akgün, Müşerref Asuman; Ju, Fudong (Informa UK Limited, 1990-6)
The dynamic response of planar frame structures composed of damped Bernoulli-Euler beams is computed, with and without a crack present in the structure. The inertance changes due to the crack are investigated in relation to the crack location, with the aim of developing a diagnosis method. The optimum excitation location and frequency and the optimum locations for response measurement are determined for best diagnosis results. The effects of crack location and severity and of damping are investigated. Dampi...
Electrical impedance tomography using the magnetic field generated by injected currents
Birgul, O; Ider, YZ (1996-11-03)
In 2D EIT imaging, the internal distribution of the injected currents generate a magnetic field in the imaging region which can be measured by magnetic resonance imaging techniques. This magnetic field is perpendicular to the imaging region on the imaging region and it can be used in reconstructing the conductivity distribution inside the imaging region. For this purpose, internal current distribution is found using the finite element method. The magnetic fields due to this current is found using Biot-Savar...
Citation Formats
K. Çırçır and S. Kocaman, “Electrical crosstalk suppression for mesa-based in-device passivated InGaAs photodetectors,” INFRARED PHYSICS & TECHNOLOGY, vol. 127, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/100204.