Linearly polarized lasing in one-dimensional hybrid photonic crystal containing cholesteric liquid crystal

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Yuko Matsuhisa, Ryotaro Ozaki, Yuuki Takao, and Masanori Ozaki, J. Appl. Phys. 101, 033120 (2007) and may be found at https://doi.org/10.1063/1.2434835

Electrically color-tunable defect mode lasing in one-dimensional photonic-band-gap system containing liquid crystal

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Ryotaro Ozaki, Tatsunosuke Matsui, Masanori Ozaki, and Katsumi Yoshino, Appl. Phys. Lett. 82, 3593 (2003) and may be found at https://doi.org/10.1063/1.1577829

Electrically tunable lasing based on defect mode in one-dimensional photonic crystal with conducting polymer and liquid crystal defect layer

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Ryotaro Ozaki, Yuko Matsuhisa, Masanori Ozaki, and Katsumi Yoshino, Appl. Phys. Lett. 84, 1844 (2004) and may be found at https://doi.org/10.1063/1.1686891

Laser actions in nano-helical-structured liquid crystals

Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United StatesMasanori Ozaki, Ryotaro Ozaki, Tatsunosuke Matsui D.D.S., and Katsumi Yoshino "Laser actions in nano-helical-structured liquid crystals", Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004). DOI: https://doi.org/10.1117/12.55554

High Q defect mode and laser action in one-dimensional hybrid photonic crystal containing cholesteric liquid crystal

The authors have investigated the optical characteristics of a one-dimensional hybrid photonic crystal (1D HPC) containing cholesteric liquid crystal (CLC) as a defect by theoretical calculation and predicted the appearance of additional modes at the band edges of the CLC defect, whose Q factor was higher than those of the other defect modes. They have confirmed the appearance of the additional mode experimentally. Single-mode laser action with low pumping threshold was observed in a 1D HPC with a dye-doped CLC defect, which is based on the additional defect mode with a high Q factor peculiar to the CLC defect having periodic structure. This work is partially supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Yuko Matsuhisa, Ryotaro Ozaki, Katsumi Yoshino, Masanori Ozaki, Appl. Phys. Lett. 89, 101109 (2006) and may be found at https://doi.org/10.1063/1.2347114

Analysis of defect mode switching response in one-dimensional photonic crystal with a nematic liquid crystal defect layer

We analyze the dynamic response and optical properties of a high-speed defect mode switching that is based on a tunable defect mode in a one-dimensional photonic crystal with a nematic liquid crystal defect layer. The electro-optic responses of the defect mode switching are calculated considering the director distributions in the defect layer, which are determined using continuum theory. The calculated defect mode switching exhibits a response on the order of microseconds in spite of the use of the reorientation of nematic liquid crystal molecules. From the calculation, it is found that the fast response is realized using a narrow peak shift and a fast part of the molecular reorientation. Furthermore, the dependences of the switching response are clarified on several physical parameters.This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Ryotaro Ozakia, Hiroshi Moritake, Katsumi Yoshino, and Masanori Ozaki, J. Appl. Phys. 101, 033503 (2007) and may be found at https://doi.org/10.1063/1.2432877