Venkatakrishnarao, D., Hasebe, S., Egawa, Y., Tapar, J., Paniagua-Domínguez, R., Lau, C. S., Yamagishi, H., Tsuji, H., & Yamamoto, Y. (2023). Solvent‐Dependent Growth of Rigid Styrylstilbene Dicarboxylic Acid Microcrystals as Bent Waveguides and Microlasers. Advanced Photonics Research, 4(4). Portico. https://doi.org/10.1002/adpr.202200357
Abstract:
Organic single-crystalline structures can effectively generate and confine photons,
which can be potential building blocks for the optical circuits. While designing of
organic molecules can tune the photoluminescence (PL) property, it is challenging
to achieve efficient laser emission and light resonance in different forms of
molecular aggregates. Herein, a dicarboxylated carbon-bridged oligophenylenevinylene
(COPV2-(COOH)2) is newly synthesized. The THF/water solution of
COPV2-(COOH)2 exhibits green-color PL with quantum yield >0.90 over the range
of THF/water=100/0–40/60. COPV2-(COOH)2 forms either bent microrods (MR)
or microsheets (MS) depending on the crystallization solvents. Significantly, PL
resonance and lasing are only observed in MS, indicating that MS has better light
confinement property than MR. MS features Q-factor as high as 1.8 103 with the
lasing threshold of 222 μJ cm2. Finite-difference time-domain (FDTD)-simulated
electric field distributions in MR and MS validate experimental observations.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the A*STAR - MTC YIRG grant
Grant Reference no. : M21K3c0124
This research / project is supported by the A*STAR - MTC Programmatic grant
Grant Reference no. : M21J9b0085
This research / project is supported by the A*STAR - AME Programmatic Grant, Singapore,
Grant Reference no. : A18A7b0058
This work was supported by CREST (JPMJCR20T4) and ACT-X
(JPMJAX201J) from Japan Science and Technology Agency (JST) and JSPS KAKENHI grant JP19H05716 and 19H05714.