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Towards perfect light coupling and a...

Chadha, Arvinder Singh.

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Towards perfect light coupling and absorption in nanomembranes with omni-directional anti-reflection and photonic crystal structures.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Towards perfect light coupling and absorption in nanomembranes with omni-directional anti-reflection and photonic crystal structures./
Author:	Chadha, Arvinder Singh.
Description:	126 p.
Notes:	Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.
Contained By:	Dissertation Abstracts International75-10B(E).
Subject:	Electrical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3624473
ISBN:	9781303980282

Towards perfect light coupling and absorption in nanomembranes with omni-directional anti-reflection and photonic crystal structures.
Chadha, Arvinder Singh.

Towards perfect light coupling and absorption in nanomembranes with omni-directional anti-reflection and photonic crystal structures. - 126 p.

Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.

Thesis (Ph.D.)--The University of Texas at Arlington, 2014.

This item must not be sold to any third party vendors.

Silicon photonics is realized as a promising platform to meet the requirements of higher bandwidth and low cost high density monolithic integration. More recent demonstrations of a variety of stretchable, foldable and transfer printed ultra-thin silicon integrated circuits have instigated the use of flexible silicon nanomembrane for practical applications. Equally impressive innovations are demonstrated in the area of flat screen displays, smart cards, eyeglasses, and wearable displays. However, the overall efficiency of a variety of optical device is limited by poor light management resulting from difficulty of light coupling, small absorption volume in thin-film nanomembrane, and glare at oblique incidence to name a few. The aim of this thesis is to present the work of micro- and nano-scale structures for out-of-plane light coupling and absorption for integrated silicon photonics and high performance solar cells and photodetectors, with maximum absorption in the functional layer and minimal front-surface reflection and minimal rear-surface transmission.

ISBN: 9781303980282Subjects--Topical Terms:

649834
Electrical engineering.

Towards perfect light coupling and absorption in nanomembranes with omni-directional anti-reflection and photonic crystal structures.
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020 $a 9781303980282
035 $a (MiAaPQ)AAI3624473
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100 1 $a Chadha, Arvinder Singh. $3 3176882
245 1 0 $a Towards perfect light coupling and absorption in nanomembranes with omni-directional anti-reflection and photonic crystal structures.
300 $a 126 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.
500 $a Adviser: Weidong Zhou.
502 $a Thesis (Ph.D.)--The University of Texas at Arlington, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a Silicon photonics is realized as a promising platform to meet the requirements of higher bandwidth and low cost high density monolithic integration. More recent demonstrations of a variety of stretchable, foldable and transfer printed ultra-thin silicon integrated circuits have instigated the use of flexible silicon nanomembrane for practical applications. Equally impressive innovations are demonstrated in the area of flat screen displays, smart cards, eyeglasses, and wearable displays. However, the overall efficiency of a variety of optical device is limited by poor light management resulting from difficulty of light coupling, small absorption volume in thin-film nanomembrane, and glare at oblique incidence to name a few. The aim of this thesis is to present the work of micro- and nano-scale structures for out-of-plane light coupling and absorption for integrated silicon photonics and high performance solar cells and photodetectors, with maximum absorption in the functional layer and minimal front-surface reflection and minimal rear-surface transmission.
520 $a Perfect absorption in a variety of semiconductor nanomembranes (NM) and atomic layers of two dimensional (2D) materials over different wavelength spectrum is realized due to the local field intensity enhancement at critical coupling to the guided resonances of a photonic crystal (PC). A judicious choice of grating parameters tailors the power diffracted in the zeorth order and higher order modes making the device work as a broadband reflector, an in-plane coupler or a combination of both reflector and an in-plane coupler. At surface normal incidence, the polarization dependence of the grating based reflector is eliminated by the use of 2D photonic crystals. The incorporation of such a reflector after the functional nanomembrane layer reduces the back-surface transmission. Effect of incident angle, polarization and incident plane misalignment dependence on the reflection of a silicon NM based reflector are investigated in detail. The front-surface Fresnel reflection is reduced with the incorporation of an omni-directional anti-reflection coating (Omni-ARC) based on nanostructures or by deposition of graded refractive index (GRIN) films. A design methodology based on the comparison of the rate of change of the refractive index profile of nanostructures of different shapes and thickness as an equivalent GRIN film suggests the minimum feature size needed to give near perfect ARC. Numerical models were built to account for the non - uniform GRIN film deposition on both rigid and flexible, flat and curved surfaces resulting from the variation in the resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE) process technology.
520 $a With the miniaturization of the devices, the effect of finite beam size and finite active area of the photonic components on the optical properties like transmission, reflection and scattering loss was studied as well. All the numerical studies presented in the thesis are validated by experimental results.
590 $a School code: 2502.
650 4 $a Electrical engineering. $3 649834
650 4 $a Optics. $3 517925
650 4 $a Nanotechnology. $3 526235
690 $a 0544
690 $a 0752
690 $a 0652
710 2 $a The University of Texas at Arlington. $b Electrical Engineering. $3 1018571
773 0 $t Dissertation Abstracts International $g 75-10B(E).
790 $a 2502
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3624473