MS Defense by Shengtao Yu

Event Details
  • Date/Time:
    • Tuesday April 30, 2019
      10:00 am - 12:00 pm
  • Location: MOSE 2100F
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Summaries

Summary Sentence: “Integration of Optical Structures with Chiral Nanocellulose Films”

Full Summary: No summary paragraph submitted.

THE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING

 

GEORGIA INSTITUTE OF TECHNOLOGY

 

Under the provisions of the regulations for the degree

MASTER OF SCIENCE

on Tuesday, April 30, 2019

10:00 AM

in MOSE 2100F

 

will be held the

 

MASTER’S THESIS DEFENSE

for

 

Shengtao Yu

 

“Integration of Optical Structures with Chiral Nanocellulose Films”

 

Committee Members:

 

Prof. Vladimir V. Tsukruk, Advisor, MSE

Prof. Zhiqun Lin, MSE

Prof. Wenshan Cai, ECE/MSE

 

Abstract:

 

Generation of circular polarized (CP) light via cellulose nanocrystals (CNC) has demonstrated great potential for next generation of chiroptical materials, thanks to the abundance, cost-effective preparation, as well as the retained chiral liquid crystal ordering in solid form.  To enhance the chiroptical properties of CNC film, a convenient strategy capable of integrating both diffractive and refractive optical structures is developed based on top-down lithographic techniques and bottom-up evaporation-induced self-assembly.  The feasibility of such strategy is proved by a few optical structures including photonic gratings, photonic crystals and micro-lenses.  The successful integration of these extrinsic structures with intrinsic chiral structure of CNC is evidenced by preservation of helical stacking structure of CNC as well as a good registration of features size down to sub-micron level with uniformity across large area on the film surface.  As a result, a combination of more accurate and sharper structural color, light focusing capability as well as enhanced circular dichroism is observed, indicating great potential in advanced optical systems based-on CP light.

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Graduate Studies

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Faculty/Staff, Public, Graduate students, Undergraduate students
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Keywords
ms defense
Status
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Apr 25, 2019 - 12:27pm
  • Last Updated: Apr 25, 2019 - 12:27pm