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All-solid passive organic optical limiter via coordination-bond anchoring strategy.

Dan Chen1,2, Yuang Chen3,4, Yunming Wang5

  • 1College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel NanoOptoelec-tronic Information Materials and Devices, National University of Defense Technology, Changsha, Hunan, 410073, China. 18874050884@163.com.

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This study presents a novel solid organic optical limiter using anchored indium phthalocyanine in polymer microspheres. The device offers robust laser protection for eyes and optics by preventing aggregation and photodegradation.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Polymer Chemistry

Background:

  • Organic optical limiters protect against laser damage but suffer from aggregation-caused quenching and photodegradation in solid-state applications.
  • Indium phthalocyanine (InPc) shows promise for optical limiting but requires strategies to overcome solid-state limitations.

Purpose of the Study:

  • To develop a high-performance, all-solid, passive organic optical limiter.
  • To overcome aggregation-caused quenching and photodegradation in solid-state organic optical limiters.
  • To create a practical laser protection device using a novel anchoring strategy.

Main Methods:

  • Fabrication of polymer microspheres containing indium phthalocyanine (InPc) anchored via coordination bonds.
  • Utilizing high-elastic-state thermo-compression for device integration.
  • Characterization of nonlinear optical properties, including nonlinear absorption coefficient and optical limiting threshold.

Main Results:

  • The coordination-bond anchoring strategy effectively suppressed InPc aggregation and facilitated intersystem crossing.
  • The resulting optical limiter exhibited a giant nonlinear absorption coefficient (4.80 × 10-5 m/W) and an ultralow optical limiting threshold (< 0.013 J/cm2) at 532 nm.
  • The device demonstrated excellent mechanical robustness and practical laser protection capabilities, validated in a smartphone camera application.

Conclusions:

  • The developed all-solid organic optical limiter offers a viable strategy for next-generation laser protection.
  • The coordination-bond anchoring approach is effective in enhancing the performance and stability of organic optical limiters.
  • The device shows potential for practical applications requiring robust protection against laser radiation.