- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
-symmetric Fibonacci aperiodic optical networks of waveguide rings
摘要： In parity-time-symmetric (PT -symmetric) Fibonacci ordered-aperiodic optical networks of waveguide rings, the beat-like pattern of the frequencies corresponding to maximum extraordinary transmission and reflection is investigated. It is found that, resembling acoustic resonance and optical beat, when these frequencies between two contiguous Fibonacci generations are sufficiently close and within a certain limit, the transmission and reflection of the following generation become stronger than those of the previous two; otherwise, they are weakened. These properties are the combined results of the optical PT symmetry and the inherent self-repeating pattern of the Fibonacci ordering, which might deepen the understandings and provide a fresh perspective on the PT -symmetric ordered-aperiodic and disordered systems.
关键词： Aperiodic optical systems,Parity-time symmetry,Optical waveguide networks
更新于2025-09-11 14:15:04
-
Flexible Luminescent Organic Bulk Crystal: 2D Elasticity toward 3D Optical Waveguide
摘要： The study of elastic organic single crystals becomes a hot research field in the crystal engineering, and elastic bending of needle-like crystals has been carefully investigated recently. Herein, based on a structurally simple molecule dimethyl 2,5-diaminoterephthalate (DMDAT), the organic crystals which display not only elastic bending ability but also elastic twisting ability under applied stress are reported. These ribbon-like DMDAT crystals are fully flexible and can be freely bended and twisted, thus forming any 3D conformation. Moreover, the unique X-shaped tetrasubstituted benzene structure enables DMDAT crystals to display efficient yellow emission based on a very small π-system. Taking these advantages, 3D optical waveguide is successfully realized in the DMDAT crystal with a highly twisted 3D belt-shaped structure, demonstrating the ultimate 3D application of flexible organic bulk crystals.
关键词： fluorophore,optical waveguide,flexible crystal,organic crystal
更新于2025-09-11 14:15:04
-
Improved Optical Waveguide Microcantilever for Integrated Nanomechanical Sensor
摘要： This paper reports on an improved optical waveguide microcantilever sensor with high sensitivity. To improve the sensitivity, a buffer was introduced into the connection of the input waveguide and optical waveguide cantilever by extending the input waveguide to reduce the coupling loss of the junction. The buffer-associated optical losses were examined for different cantilever thicknesses. The optimum length of the buffer was found to be 0.97 μm for a cantilever thickness of 300 nm. With this configuration, the optical loss was reduced to about 40%, and the maximum sensitivity was more than twice that of the conventional structure.
关键词： sensitivity,optical waveguide cantilever sensor,buffer
更新于2025-09-11 14:15:04
-
Non-Markovian dynamics revealed at a bound state in the continuum
摘要： We propose a methodical approach to controlling and enhancing deviations from exponential decay in quantum and optical systems by exploiting recent progress surrounding another subtle effect: the bound states in the continuum, which have been observed in optical waveguide array experiments within this past decade. Specifically, we show that by populating an initial state orthogonal to that of the bound state in the continuum, it is possible to engineer system parameters for which the usual exponential decay process is suppressed in favor of inverse power law dynamics and coherent effects that typically would be extremely difficult to detect in experiment. We demonstrate our method using a model based on an optical waveguide array experiment and further show that the method is robust even in the face of significant detuning from the precise location of the bound state in the continuum.
关键词： optical waveguide array,bound state in the continuum,quantum decay,Non-Markovian dynamics
更新于2025-09-11 14:15:04
-
[IEEE 2018 20th International Conference on Transparent Optical Networks (ICTON) - Bucharest (2018.7.1-2018.7.5)] 2018 20th International Conference on Transparent Optical Networks (ICTON) - Nonlinear Optical Phenomena in Silicon-Smectic A Liquid Crystal (SALC) Waveguiding Structures
摘要： Liquid crystals (LCs) are organic materials characterized by a certain degree of ordering and anisotropy in their fluido-dynamic, elastic and electromagnetic properties. LCs possess strong optical nonlinearity. Due to these unique properties, LCs are promising candidates for the development of novel integrated devices for telecommunications and sensing. Nematic liquid crystals (NLCs) are mostly used and studied. However, smectic A liquid crystals (SALCs) have a higher degree of long range order, lower scattering losses in SALC, and they can be useful in nonlinear optical applications. We theoretically studied the nonlinear optical phenomena in a Silicon-SALC waveguide. We have shown that the strong stimulated light scattering (SLS) caused by SALC nonlinearity can occur in the Silicon-SALC waveguide.
关键词： silicon photonics,optical waveguide,stimulated light scattering,smectic A liquid crystal (SALC)
更新于2025-09-09 09:28:46