Open AccessSpatially tunable photonic bandgap of wide spectral range and lasing emission based on a blue phase wedge cell
Author(s) -
James T. Lin,
Shuan Yu Huang,
Hong Sheng Wang,
Sheng Huang Lin,
Ting Mo,
Chi Ting Horng,
H. C. Yeh,
Lin Jer Chen,
Hong Lin,
Chia Rong Lee
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.029479
Subject(s) - photonic crystal , lasing threshold , materials science , optics , wedge (geometry) , optoelectronics , photonics , band gap , physics , wavelength
This study demonstrates for the first time a continuously tunable photonic bandgap (PBG) of wide spectral range based on a blue phase (BP) wedge cell. A continuously shifting PBG of the BP wedge cell occurs due to the thickness gradient of the wedge cell at a fixed temperature. The wedge cell provides a gradient of boundary force on the LCs and thus forms a distribution of BP crystal structure with a gradient lattice. Additionally, a spatially tunable lasing emission based on a dye-doped BP (DDBP) wedge cell is also demonstrated. The tunable band of the PBG and lasing emission is about 130 nm and 70 nm, respectively, which tuning spectral ranges are significantly wider than those of CLC and DDCLC wedge cells, respectively. Such a BP device has a significant potential in applications of tunable photonic devices and displays.