Random lasing from structurally-modulated silk fibroin nanofibers

Soocheol Kim, Sung Yeun Yang, Seung Ho Choi, Young L. Kim, Won Hyoung Ryu, Chulmin Joo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Structural arrangement and dimension play vital roles in wave transport and amplification as they can restrict the volume explored by the waves. However, it is challenging to systematically investigate the interplay among structural, optical, and mechanical properties, in part because of limited experimental platforms that modulate the structural arrangement in a continuous manner. We present light amplification action in Rhodamine B doped silk fibroin (SF) nanofibrous scaffolds and its modulation via the control of the alignment or directionality of SF nanofibers through an electrospinning procedure. Random lasing features of such scaffolds are examined as a function of structural arrangement of the SF nanofibers, and optical-structural-mechanical relationships of the SF-based structures are examined. As SF nanofibers are aligned parallel undergoing a transition from three to quasi-two dimension, light amplification features (e.g., lasing threshold and output power) enhanced, which also strongly correlated with mechanical characteristics (i.e., Young's moduli) of the scaffolds. We confirm such optical characteristics using quasi-mode analyses based on the finite element method. We further demonstrate non-contact, in situ measurement of alternations in lasing features of the scaffolds while the specimens are under tensile loads. These results may highlight potential utility of the scaffolds as a flexible and biocompatible sensor.

Original languageEnglish
Article number4506
JournalScientific reports
Volume7
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

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silk
lasing
alternations
rhodamine
in situ measurement
modulus of elasticity
finite element method
platforms
alignment
mechanical properties
modulation
optical properties
thresholds
output
sensors

All Science Journal Classification (ASJC) codes

  • General

Cite this

Kim, Soocheol ; Yang, Sung Yeun ; Choi, Seung Ho ; Kim, Young L. ; Ryu, Won Hyoung ; Joo, Chulmin. / Random lasing from structurally-modulated silk fibroin nanofibers. In: Scientific reports. 2017 ; Vol. 7, No. 1.
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Random lasing from structurally-modulated silk fibroin nanofibers. / Kim, Soocheol; Yang, Sung Yeun; Choi, Seung Ho; Kim, Young L.; Ryu, Won Hyoung; Joo, Chulmin.

In: Scientific reports, Vol. 7, No. 1, 4506, 01.12.2017.

Research output: Contribution to journalArticle

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