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Double-Pointed Optical Antenna and S...

Ghafary Aghdam, Ainaz,

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Double-Pointed Optical Antenna and Shortwave Infrared Avalanche Photodiode /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Double-Pointed Optical Antenna and Shortwave Infrared Avalanche Photodiode // Ainaz Ghafary Aghdam.
Author:	Ghafary Aghdam, Ainaz,
Description:	1 electronic resource (81 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Contained By:	Dissertations Abstracts International86-03B.
Subject:	Electrical engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31145338
ISBN:	9798384072676

Double-Pointed Optical Antenna and Shortwave Infrared Avalanche Photodiode /
Ghafary Aghdam, Ainaz,

Double-Pointed Optical Antenna and Shortwave Infrared Avalanche Photodiode /Ainaz Ghafary Aghdam. - 1 electronic resource (81 pages)

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

The importance of infrared radiation in human life made it a very attractive field, and research is ongoing in this area. Even though more than two centuries have passed since its discovery. During these years, infrared detection has received lots of attention, and the main research has been conducted to enhance the infrared photodetection performance. Surface plasmonic resonance is one of the methods that could enhance the performance of the photodetector.Numerous attempts have been made in the Center for Photonics, Electromagnetics, and Nanoelectronics (CPEN) at the University of Massachusetts Lowell to enhance the performance of photodetectors made from different semiconductor materials in terms of QDIPs and PIN photodetectors. Different plasmonic structures like hole arrays, metallic disk arrays, metallic rings, and pointed antennas have been fully investigated, and the effects of parameters like diameter, length, period, and metal thickness have been fully studied. In this research, I want to present a new kind of plasmonic structure called Double-pointed optical antenna and its enhancement in the longwave infrared (8-12 μm) spectral regime. This complex structure has sharp corners that can enhance the E-field. The Double-pointed optical antennas have been simulated and compared with the Single-pointed optical antenna. It has been discovered that the Double -pointed optical antennas show higher E-fields in the LWIR spectral regime for both the single antenna and coupled antenna configurations. I investigate how different geometry parameters, such as the gap size, the length, and the width, affect the E-field enhancement of the Double-pointed antenna. The uncoupled Double pointed optical antenna can be modeled as an RLC circuit, whereas the coupled Double pointed dipole antennas show clear Fano-type interference between the transmission and the discrete plasmonic resonant modes. The E-fields of the Double pointed antenna are also compared to those of the bow-tie antennas with the same gap dimension.Moreover, I want to report a new type of avalanche photodetector that is made from InGaAsSb/GaSb with a separation between the absorption layer and the multiplication layer called Separated Absorption Multiplication (SAM) in a short infrared wavelength up to 2 μm. The APD is used for detecting very low-level signals, and in cases where the noise of the amplifier is high, it is the best choice. In addition, the SAM APD shows low dark current and high gain. The characteristics of this SAM APD have been tested, and multiplication gain has been measured.

English

ISBN: 9798384072676Subjects--Topical Terms:

649834
Electrical engineering.
Subjects--Index Terms:

Double pointed optical antenna

Double-Pointed Optical Antenna and Shortwave Infrared Avalanche Photodiode /
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520 $a The importance of infrared radiation in human life made it a very attractive field, and research is ongoing in this area. Even though more than two centuries have passed since its discovery. During these years, infrared detection has received lots of attention, and the main research has been conducted to enhance the infrared photodetection performance. Surface plasmonic resonance is one of the methods that could enhance the performance of the photodetector.Numerous attempts have been made in the Center for Photonics, Electromagnetics, and Nanoelectronics (CPEN) at the University of Massachusetts Lowell to enhance the performance of photodetectors made from different semiconductor materials in terms of QDIPs and PIN photodetectors. Different plasmonic structures like hole arrays, metallic disk arrays, metallic rings, and pointed antennas have been fully investigated, and the effects of parameters like diameter, length, period, and metal thickness have been fully studied. In this research, I want to present a new kind of plasmonic structure called Double-pointed optical antenna and its enhancement in the longwave infrared (8-12 μm) spectral regime. This complex structure has sharp corners that can enhance the E-field. The Double-pointed optical antennas have been simulated and compared with the Single-pointed optical antenna. It has been discovered that the Double -pointed optical antennas show higher E-fields in the LWIR spectral regime for both the single antenna and coupled antenna configurations. I investigate how different geometry parameters, such as the gap size, the length, and the width, affect the E-field enhancement of the Double-pointed antenna. The uncoupled Double pointed optical antenna can be modeled as an RLC circuit, whereas the coupled Double pointed dipole antennas show clear Fano-type interference between the transmission and the discrete plasmonic resonant modes. The E-fields of the Double pointed antenna are also compared to those of the bow-tie antennas with the same gap dimension.Moreover, I want to report a new type of avalanche photodetector that is made from InGaAsSb/GaSb with a separation between the absorption layer and the multiplication layer called Separated Absorption Multiplication (SAM) in a short infrared wavelength up to 2 μm. The APD is used for detecting very low-level signals, and in cases where the noise of the amplifier is high, it is the best choice. In addition, the SAM APD shows low dark current and high gain. The characteristics of this SAM APD have been tested, and multiplication gain has been measured.
546 $a English
590 $a School code: 0111
650 4 $a Electrical engineering. $3 649834
650 4 $a Pacific Rim studies. $3 3168440
650 4 $a Electromagnetics. $3 3173223
650 4 $a Optics. $3 517925
653 $a Double pointed optical antenna
653 $a Infrared photodetector
653 $a InGaAsSb
653 $a Optical plasmonic antenna
653 $a CPEN
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690 $a 0561
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710 2 $a University of Massachusetts Lowell. $b Electrical Engineering. $e degree granting institution. $3 3817049
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773 0 $t Dissertations Abstracts International $g 86-03B.
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