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On the Third Order Optical Non-linea...
~
La Porta, Philip Robert.
On the Third Order Optical Non-linearities of Small Organic Molecules: Investigation, Analysis and Optimization.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
On the Third Order Optical Non-linearities of Small Organic Molecules: Investigation, Analysis and Optimization./
作者:
La Porta, Philip Robert.
面頁冊數:
79 p.
附註:
Source: Dissertation Abstracts International, Volume: 73-02, Section: B, page: 0987.
Contained By:
Dissertation Abstracts International73-02B.
標題:
Chemistry, Organic. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3478548
ISBN:
9781124962276
On the Third Order Optical Non-linearities of Small Organic Molecules: Investigation, Analysis and Optimization.
La Porta, Philip Robert.
On the Third Order Optical Non-linearities of Small Organic Molecules: Investigation, Analysis and Optimization.
- 79 p.
Source: Dissertation Abstracts International, Volume: 73-02, Section: B, page: 0987.
Thesis (Ph.D.)--Lehigh University, 2011.
Organic materials, with highly delocalized electron systems, fast response times, compact size and relative ease of customization have ushered in a new generation of molecular designs for high optical non-linearities. Our aim in this work was to investigate the third-order optical polarizabilities of several families of small organic molecules, providing insights into molecular design for third-order optical non-linearities. To begin, two distinct families of molecules were examined. Experiments on one group of molecules supported claims that end groups of molecules have no effect on the strength of third-order non-linearities. Experimental results from the other, helped demonstrate the effect of pi-conjugation as well as provide a new design pathway for third-order non-linear optics. Next, two related families of organic molecules were examined. Both have systematically increasing conjugation length, but one has carbon-carbon (C-C) double bond spacers (Donor-Acceptor Substituted Oligoenes), and the other has C-C triple bond ( Donor-Acceptor Substituted Oligo ynes) spacers. We showed that the DASOe's follow trends established both in previous experiments and theoretical calculations while the DASOy's, due to molecular instabilities, fail to perform as expected beyond a spacer length of three. We also investigated a new molecular design that supports the claim that triple-bond spaced chromophores (like the DASOy series) can be extended beyond a length of three spacers and still yield strong third-order polarizabilities. This new molecular design was shown to be stable up to a spacer length of five bonds and has the highest value of third-order polarizability [40+/-10x10-48m5/V2 ] found in this work. Also, several of these molecules have third-order polarizability values very close to the fundamental limit and high nonlinearities per unit mass.
ISBN: 9781124962276Subjects--Topical Terms:
596209
Chemistry, Organic.
On the Third Order Optical Non-linearities of Small Organic Molecules: Investigation, Analysis and Optimization.
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Organic materials, with highly delocalized electron systems, fast response times, compact size and relative ease of customization have ushered in a new generation of molecular designs for high optical non-linearities. Our aim in this work was to investigate the third-order optical polarizabilities of several families of small organic molecules, providing insights into molecular design for third-order optical non-linearities. To begin, two distinct families of molecules were examined. Experiments on one group of molecules supported claims that end groups of molecules have no effect on the strength of third-order non-linearities. Experimental results from the other, helped demonstrate the effect of pi-conjugation as well as provide a new design pathway for third-order non-linear optics. Next, two related families of organic molecules were examined. Both have systematically increasing conjugation length, but one has carbon-carbon (C-C) double bond spacers (Donor-Acceptor Substituted Oligoenes), and the other has C-C triple bond ( Donor-Acceptor Substituted Oligo ynes) spacers. We showed that the DASOe's follow trends established both in previous experiments and theoretical calculations while the DASOy's, due to molecular instabilities, fail to perform as expected beyond a spacer length of three. We also investigated a new molecular design that supports the claim that triple-bond spaced chromophores (like the DASOy series) can be extended beyond a length of three spacers and still yield strong third-order polarizabilities. This new molecular design was shown to be stable up to a spacer length of five bonds and has the highest value of third-order polarizability [40+/-10x10-48m5/V2 ] found in this work. Also, several of these molecules have third-order polarizability values very close to the fundamental limit and high nonlinearities per unit mass.
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