Multiple Quantum Barrier Nano-avalanche Photodiodes - Part III: Time and Frequency Responses

Author(s): Somrita Ghosh, Aritra Acharyya*.

Journal Name: Nanoscience & Nanotechnology-Asia

Volume 9 , Issue 2 , 2019

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Abstract:

Background: The time and frequency responses of Multiple Quantum Barrier (MQB) nano-scale Avalanche Photodiodes (APDs) based on Si~3C-SiC material system have been investigated in this final part.

Methods: A very narrow rectangular pulse of pulse-width of 0.4 ps has been used as the input optical pulse having 850 nm wavelength incidents on the p+-side of the MQB APD structures and corresponding current responses have been calculated by using a simulation method developed by the authors.

Results: Finally the frequency responses of the devices are obtained via the Fourier transform of the corresponding pulse current responses in time domain.

Conclusion: Simulation results show that MQB nano-APDs possess significantly faster time response and wider frequency response as compared to the flat Si nano-APDs under similar operating conditions.

Keywords: Avalanche photodiode, dark current, multiple quantum barrier, photocurrent, quantum well, self-consistent solution, spectral response.

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Article Details

VOLUME: 9
ISSUE: 2
Year: 2019
Page: [192 - 197]
Pages: 6
DOI: 10.2174/2210681208666180813122642
Price: $58

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