Related Experiment Video
Updated: Jul 23, 2025
07:51
Fabrication of Silica Ultra High Quality Factor Microresonators
Published on: July 2, 2012
16.5K
Flexible and Red-Emissive Organic Single-Crystal Microresonator for Efficient Active Waveguides
Takumi Matsuo1, Junpei Kuwabara2, Takaki Kanbara2
1School of Science and Engineering, Kochi University of Technology, Kami, Kochi 782-8502, Japan.
The Journal of Physical Chemistry Letters
|July 17, 2023
Summary
Flexible red-emitting diketopyrrolopyrrole (DPP) microcrystals act as efficient optical waveguides. These microcrystal resonators demonstrate strong photon confinement, enabling effective light guiding even in curved structures.
Area of Science:
- Materials Science
- Optoelectronics
- Photonics
Background:
- Organic microcrystal resonators are promising for photonic applications.
- Efficient optical waveguiding in flexible materials remains a challenge.
Purpose of the Study:
- To fabricate and characterize flexible, red-emissive microcrystal resonators for optical waveguiding.
- To investigate the relationship between material properties and waveguiding efficiency.
Main Methods:
- Fabrication of diketopyrrolopyrrole (DPP) microfiber crystals.
- Photoluminescence (PL) spectroscopy to analyze optical properties.
- Spatially resolved PL measurements to assess waveguiding performance.
Main Results:
- DPP microcrystals exhibited high photoluminescence quantum efficiency (ΦPL = 0.45).
- Naturally formed Fabry-Pérot crystal resonators were observed.
- Efficient optical waveguiding was demonstrated in curved crystals (radius of 11 μm) with strong photon confinement (ng = 3.7-6.0, ℏΩ = 1.38 eV).
Conclusions:
- Flexible DPP microcrystals can function as efficient optical waveguides.
- Strong photon confinement within the microcrystal resonator is key to effective waveguiding.
- These findings open possibilities for flexible optoelectronic devices.
