Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Ruan, Qifeng"'
Autor:
Pan, Cheng-Feng, Wang, Hao, Wang, Hongtao, S, Parvathi Nair, Ruan, Qifeng, Wredh, Simon, Ke, Yujie, Chan, John You En, Zhang, Wang, Qiu, Cheng-Wei, Yang, Joel K. W.
Flat optics consisting of nanostructures of high-refractive-index materials produce lenses with thin form factors that tend to operate only at specific wavelengths. Recent attempts to achieve achromatic lenses uncover a trade-off between the numerica
Externí odkaz:
http://arxiv.org/abs/2308.14051
Autor:
Raut, Hemant Kumar, Ruan, Qifeng, Finet, Cédric, Saranathan, Vinodkumar, Yang, Joel, Fernandez, Javier Gomez
Publikováno v:
Adv. Mater. Interfaces 2022, 2201419
The colourful wings of butterflies result from the interaction between light and the intricate chitinous nanostructures on butterflies' scales. This study demonstrates that just by reproducing the chitinous ridges present in butterfly scales (i.e., w
Externí odkaz:
http://arxiv.org/abs/2210.06013
Autor:
Wang, Hongtao, Wang, Hao, Ruan, Qifeng, Chan, John You En, Zhang, Wang, Liu, Hailong, Rezaei, Soroosh Daqiqeh, Trisno, Jonathan, Qiu, Cheng-Wei, Gu, Min, Yang, Joel K. W.
The orbital angular momentum (OAM) of light holds great promise for applications in optical communication, super-resolution imaging, and high-dimensional quantum computing. However, the spatio-temporal coherence of the light source has been essential
Externí odkaz:
http://arxiv.org/abs/2207.13383
Autor:
Chan, John You En, Ruan, Qifeng, Wang, Hongtao, Wang, Hao, Liu, Hailong, Yan, Zhiyuan, Qiu, Cheng-Wei, Yang, Joel K. W.
Under white light illumination, gratings produce an angular distribution of wavelengths dependent on the diffraction order and geometric parameters. However, previous studies of gratings are limited to at least one geometric parameter (height, period
Externí odkaz:
http://arxiv.org/abs/2204.06191
Autor:
Zhang, Wang, Wang, Hao, Tan, Alvin T. L., Ranganath, Anupama Sargur, Zhang, Biao, Wang, Hongtao, Chan, John You En, Ruan, Qifeng, Liu, Hailong, Ha, Son Tung, Wang, Dong, Ravikumar, Venkat K., Low, Hong Yee, Yang, Joel K. W.
Reconfigurable metamaterials require constituent nanostructures to demonstrate switching of shapes with external stimuli. For generality, such nanostructures would touch and stick to other surfaces in one of its configurations. Yet, a longstanding ch
Externí odkaz:
http://arxiv.org/abs/2202.10648
Autor:
Liu, Hailong, Wang, Hongtao, Wang, Hao, Deng, Jie, Ruan, Qifeng, Zhang, Wang, Abdelraouf, Omar A. M., Ang, Noman Soo Seng, Dong, Zhaogang, Yang, Joel K. W., Liu, Hong
It remains a challenge to directly print three-dimensional arbitrary shapes that exhibit structural colors at the micrometer scale. Woodpile photonic crystals (WPCs) fabricated via two-photon lithography (TPL) are promising as building blocks to prod
Externí odkaz:
http://arxiv.org/abs/2201.08151
Autor:
Ruan, Qifeng, Zhang, Wang, Wang, Hao, Chan, John You En, Wang, Hongtao, Liu, Hailong, Fan, Dianyuan, Li, Ying, Qiu, Cheng-Wei, Yang, Joel K. W.
Colour changes can be achieved by straining photonic crystals or gratings embedded in stretchable materials. However, the multiple repeat units and the need for a volumetric assembly of nanostructures limit the density of information content. Inspire
Externí odkaz:
http://arxiv.org/abs/2109.00730
Autor:
Dong, Zhaogang, Jin, Lei, Rezaei, Soroosh Daqiqeh, Wang, Hao, Chen, Yang, Tjiptoharsono, Febiana, Ho, Jinfa, Gorelik, Sergey, Ng, Ray Jia Hong, Ruan, Qifeng, Qiu, Cheng-Wei, Yang, Joel K. W.
While structural colors are ubiquitous in nature, saturated reds are mysteriously absent. Hence, a longstanding problem is in fabricating nanostructured surfaces that exhibit reflectance approaching the theoretical limit. This limit is termed the Sch
Externí odkaz:
http://arxiv.org/abs/2106.12285
Autor:
Chan, John You En, Ruan, Qifeng, Jiang, Menghua, Wang, Hongtao, Wang, Hao, Zhang, Wang, Qiu, Cheng-Wei, Yang, Joel K. W.
A light field print (LFP) displays three-dimensional (3D) information to the naked-eye observer under ambient white light illumination. Changing perspectives of a 3D image are seen by the observer from varying angles. However, LFPs appear pixelated d
Externí odkaz:
http://arxiv.org/abs/2012.08921
Autor:
Wang, Hao, Ruan, Qifeng, Wang, Hongtao, Rezaei, Soroosh Daqiqeh, Lim, Kevin T. P., Liu, Hailong, Zhang, Wang, Trisno, Jonathan, Chan, John You En, Yang, Joel K. W.
Varying only the in-plane or out-of-plane dimensions of nanostructures produces a wide range of colourful elements in metasurfaces and thin films. However, achieving shades of grey and control of colour saturation remains challenging. Here, we introd
Externí odkaz:
http://arxiv.org/abs/2010.11035