Directional random lasing in dye-TiO2 doped polymer nanowire array embedded in porous alumina membrane

Hee Won Shin, Seung Yeon Cho, Kyong Hoon Choi, Seung Lim Oh, Yong Rok Kim

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We have demonstrated the lasing in the porous alumina membrane filled with hybrid polymer nanowires which consisted of poly(N-vinylcarvazole), rhodamine 6G, and TiO2 nanoparticles. The angle-resolved photoluminescence measurement suggested that lasing had a strong directionality along the hybrid polymer nanowires which were embedded within the nanochannels of the membrane. Although wavelengths of the lasing peaks were not affected by excitation and detection angles, lasing behavior strongly depended on the pore diameters of the membranes utilized. It is suggested that the closed loops for lasing are formed via multiple scattering induced by TiO2 nanoparticles embedded in the hybrid polymer nanowires.

Original languageEnglish
Article number263112
JournalApplied Physics Letters
Issue number26
Publication statusPublished - 2006

Bibliographical note

Funding Information:
This work was financially supported by a National Research Laboratory (Grant No. M1-0302-00-0027) program administered by the Ministry of Science and Technology (MOST) of Korea and a Yonsei Center for Studies on Intelligent Biomimic Molecular Systems. The authors are grateful for the instrumental support from the equipment facility of CRM-KOSEF.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Directional random lasing in dye-TiO2 doped polymer nanowire array embedded in porous alumina membrane'. Together they form a unique fingerprint.

Cite this