Results 101 to 110 of about 23,600 (270)

Temperature‐Dependent Properties of Amino‐As Based InAs/ZnSe Core‐Shell Quantum Dot Films

Advanced Optical Materials, EarlyView.
InAs colloidal quantum dots (CQDs) exhibit tunable optical bandgap covering the near‐infrared spectrum, making them attractive for various optoelectronicapplications. This work demonstrates that their optical properties are partially maintained up to 250°C, where Atomic Force Microscopy (AFM) and Kelvin Probe Force Microscopy (KPFM) measurements reveal
Mukesh Kumar Thakur, Guncem Ozgun Eren, Meenakshi Pegu, Houman Bahmani Jalali, Magdhi Kirti, Matteo Lorenzoni, Mirko Prato, Yurii P. Ivanov, Giorgio Divitini, Ilka Kriegel, Liberato Manna, Francesco Di Stasio   +11 more
wiley   +1 more source

Bandwidth and Electron Correlation-Tuned Superconductivity in Rb$_{0.8}$Fe$_{2}$(Se$_{1-z}$S$_z$)$_2$

, 2015
We present a systematic angle-resolved photoemission spectroscopy study of the substitution-dependence of the electronic structure of Rb$_{0.8}$Fe$_{2}$(Se$_{1-z}$S$_z$)$_2$ (z = 0, 0.5, 1), where superconductivity is continuously suppressed into a ...
Birgeneau, Robert J., Bourret-Courchesne, E., Hashimoto, M., Hussain, Z., Kemper, A. F., Lanzara, A., Lu, D. H., Mo, S. -K., Shen, Z. -X., Wang, Meng, Yi, M.   +10 more
core   +1 more source

Infrared Colloidal Quantum Dot Edge Emitting Lasers Integrated on Silicon

Advanced Optical Materials, EarlyView.
In this work, the first monolithic integration of Pb‐chalcogenide CQDs in an edge‐emitting DFB laser cavity onto a Si/SiO2 substrate has been demonstrated. The optimizations of SiO2 layer thickness, engineering of the grating duty cycle, and implementing λ/4 phase shift resulted in the achievement of spectrally pure, single‐mode lasing at 1650 nm with ...
Hamed Dehghanpour Baruj, Guy L. Whitworth, Nima Taghipour, Mariona Dalmases, Debranjan Mandal, Gerasimos Konstantatos   +5 more
wiley   +1 more source

First principles theoretical studies of half-metallic ferromagnetism in CrTe

, 2010
Using full-potential linear augmented plane wave method (FP-LAPW) and the density functional theory, we have carried out a systematic investigation of the electronic, magnetic, and cohesive properties of the chalcogenide CrTe in three competing ...
B.-G. Liu, H. Akinaga, I. Turek, J. Kudrnovský, O. K. Andersen, P. Blaha, S. K. Bose, Y. Liu   +7 more
core   +1 more source

Incorporating Si into Sb2Se3: Tailoring Optical Phase Change Materials via Nanocomposites

Advanced Optical Materials, EarlyView.
We study the structural, optical, and thermal effects of adding silicon to Sb2Se3 and demonstrate that the as‐deposited solid solution phase segregates after electro‐thermal switching, creating a nanocomposite with effective‐medium properties and a phase‐change response.
Chih‐Yu Lee, Yi‐Siou Huang, Felix Adams, Chuanyu Lian, Hongyi Sun, Jie Zhao, Zichao Ye, Nathan Youngblood, Juejun Hu, Leslie H Allen, Yifei Mo, Ichiro Takeuchi, Carlos A Ríos Ocampo   +12 more
wiley   +1 more source

Quantum criticality in the iron pnictides and chalcogenides

, 2011
Superconductivity in the iron pnictides and chalcogenides arises at the border of antiferromagnetism, which raises the question of the role of quantum criticality.
Abrahams, Elihu, Si, Qimiao
core   +1 more source

An Ultra‐Wideband Metasurface Perfect Absorber Based on Hybrid Absorption Modes

Advanced Photonics Research, EarlyView.
A Ge2Sb2Te5 metasurface absorber enables polarization‐independent, ultrabroadband (UV–NIR) light absorption with high angular tolerance. Its performance stems from overlapping electric and magnetic dipole resonances in a symmetric structure, achieving 94% average absorption and maintaining 83% even at 70° incidence, promising for integrated ...
Dingbang Liu, Yusa Chen, Yunhao Cao, Lijun Ma, Shuai Wang, HongShun Sun, Mingyao Gao, Dingyi Yang, Wengang Wu   +8 more
wiley   +1 more source

The Superconducting Transition Temperatures of Fe1+xSe1--y, Fe1+xSe1--yTey and (K/Rb/Cs)zFe2--xSe2

, 2012
In a recent contribution to this journal, it was shown that the transition temperatures of optimal high-Tc compounds obey the algebraic relation, Tc0 = kB-1{\beta}/\ell{\zeta}, where \ell is related to the mean spacing between interacting charges in the ...
Anthony T Fiory, Bao W, Bao W Li G N Huang Q Chen G F He J B Green M A Qiu Y Wang D M Luo J L, Braithwaite D, Dale R Harshman, Guo J, Harshman D R, Harshman D R, Krzton-Maziopa A, Liu R H, Mizuguchi Y, Pomjakushin V Y, Shen B, Wang H-D, Wang Z, Wen J, Wilson J A, Xia Y, Ying J J   +18 more
core   +1 more source

Computational Analysis of a GST‐Based Long‐Wave Infrared Microring Resonator on a ZnSe Platform as a Photonic Sensor

Advanced Photonics Research, EarlyView.
A Ge2Sb2Te5 (GST)‐based microring resonator is designed and simulated on a ZnSe‐platform that operates in the long‐wave infrared (LWIR) wavelength of 8 μm. The structure demonstrates strong power confinement and high Q‐factor. GST resonator is used for gas and biosensing applications.
Tanzina Rahman, Md. Islahur Rahman Ebon, Amrita Kumar Sana, Jaker Hossain   +3 more
wiley   +1 more source

Atomistic Understanding of 2D Monatomic Phase‐Change Material for Non‐Volatile Optical Applications

Advanced Science, EarlyView.
Antimony is a promising monatomic phase‐change material. Scaling down the film thickness is necessary to prolong the amorphous‐state lifetime, but it alters the optical properties. The combined computational and experimental study shows that, as thickness decreases, the extinction coefficient and optical contrast are reduced in the near‐infrared ...
Hanyi Zhang, Xueqi Xing, Jiang‐Jing Wang, Chao Nie, Yuxin Du, Junying Zhang, Xueyang Shen, Wen Zhou, Matthias Wuttig, Riccardo Mazzarello, Wei Zhang   +10 more
wiley   +1 more source