The bright side and dark side of hybrid organic–inorganic perovskites by Walukiewicz, Wladek, Wang, Shu, Wu, Xinchun, Li, Rundong, Sherburne, Matthew P., Wu, Bo, Sum, Tze Chien, Ager, Joel W., Asta, Mark D.

“…The previously developed bistable amphoteric native defect (BAND) model is used for a comprehensive explanation of the unique photophysical properties and for understanding the remarkable performance of perovskites as photovoltaic materials. …”
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Broadband surface-wave transformation cloak by Xu, Su, Xu, Hongyi, Gao, Hanhong, Jiang, Yuyu, Yu, Faxin, Joannopoulos, John D., Soljačić, Marin, Chen, Hongsheng, Sun, Handong, Zhang, Baile

“…A partial realization has been achieved by exploiting topological electromagnetic surface states, but this approach is limited to narrow-band light transmission and subject to phase disturbances in the presence of disorder. …”
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Optical properties of ultrathin metal oxide and metal films : effect of free electrons, quantum confinement and localized surface plasmon resonance by Li, Xiao Dong

“…The comparison study of the free electrons between the undoped ZnO and AZO shows that free electrons could greatly suppress the excitonic absorption near the band edge and result in an expansion of band gap due to the free electrons effect. …”
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A signal through the noise: accurate determination of hydrogen atom positions in crystal structures and optimisation of Laue neutron diffraction methods by Sackman, GA

“…This has allowed a variety of chemically and crystallographically interesting studies to be performed, specifically:</p> <p>Determining the novel geometry around transition-metal hydride centers, where the signal due to the hydrides can be more confidently distinguished than in an X-ray diffraction experiment; using Laue neutron derived difference Fourier maps to demonstrate that proton disorder can be mistakenly assigned in X-ray derived crystallographic models; performing variable temperature Laue neutron diffraction to identify proton migratory behaviour across short-strong hydrogen bonds; reassigning the space group of a previously reported cobalt(III) coordination complex, in which the lack of inversion symmetry becomes apparent upon accurate determination of the hydrogen atom positions; using Laue neutron diffraction data to more confidently classify systems as co-crystals or salts.…”

Search of the early O3 LIGO data for continuous gravitational waves from the Cassiopeia A and Vela Jr. supernova remnants by Sudhir, Vivishek

“…No gravitational wave signal is detected in the search band of 20--976 Hz for assumed source ages greater than 300 years for Cas A and greater than 700 years for Vela Jr. …”
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Transition metal doped apatites as inert non-toxic pigments by Seah, Jasmine Si Han

“…The evidences include the increasing lattice parameters of the crystal structure, decreasing intensity bands attributed to the libration modes of the OH molecules, which was identified using FTIR, together with the decreasing weight percentage of O in the materials with an increasing amount of copper present in the compound. …”
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Radiometer Calibration Using Colocated GPS Radio Occultation Measurements by Cahoy, K. L., Blackwell, W. J., Bishop, R., Cohen, B., Crail, C., Cucurull, L., Dave, P., DiLiberto, M., Erickson, N., Fish, C., Ho, S. P., Leslie, R. V., Milstein, A. B., Osaretin, I. A.

“…Performance analyses show that absolute calibration accuracy better than 0.25 K is achievable for temperature sounding channels in the 50-60-GHz band for a total-power radiometer using a weakly coupled noise diode for frequent calibration and proximal GPSRO measurements for infrequent (approximately daily) calibration. …”
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End-fire surface wave antenna with metasurface coating by Wang, Ping, Shen, Zhongxiang

“…Good radiation pattern and high gain are achieved over a wide frequency band.…”
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Laser Beacon Tracking for High-Accuracy Attitude Determination by Nguyen, Tam, Cahoy, Kerri

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LKAW: a robust watermarking method based on large kernel convolution and adaptive weight assignment by Zhang, Xiaorui, Jiang, Rui, Sun, Wei, Song, Aiguo, Wei, Xindong, Meng, Ruohan

“…Further, a high-frequency wavelet loss is proposed, by which the watermarking is restricted to only the low-frequency wavelet sub-bands, thereby enhancing the robustness of watermarking against image compression. …”
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Strong electron–phonon coupling in magic-angle twisted bilayer graphene by Chen, C, Nuckolls, KP, Ding, S, Miao, W, Wong, D, Oh, M, Lee, RL, He, S, Peng, C, Pei, D, Li, Y, Hao, C, Yan, H, Xiao, H, Gao, H, Li, Q, Zhang, S, Liu, J, He, L, Watanabe, K, Taniguchi, T, Jozwiak, C, Bostwick, A, Rotenberg, E, Chen, Y

“…Calculations suggest that the formation of these flat-band replicas in superconducting MATBG are attributed to the strong coupling between flat-band electrons and an optical phonon mode at the graphene K point, facilitated by intervalley scattering. …”

Thin 3-D bandpass frequency-selective structure based on folded substrate for conformal radome applications by Omar, Ahmed Abdelmottaleb, Shen, Zhongxiang

“…By integrating one more substrate with a different dielectric constant, dual-band thin structure is achieved. One structure with a five-layer folded substrate is designed, fabricated, and measured using the parallel-plate waveguide measurement setup. …”
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Fabrication and application of novel highly ordered nano-heterostructure arrays in optoelectronics by Yadian, Boluo

“…Meanwhile, Ag2S with a narrow band gap enables more efficient absorption of incident light and faster separation of photogenerated electron-hole pairs. …”
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Effective image synthesis for effective deep neural network training by Cui, Kaiwen

“…The proposed LDA works in spectral space that allows explicit access and manipulation of each image spectrum and accordingly enables direct attack of the easy-to-discriminate image spectra. …”
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Development of indexing clamper mechanism for wire bonder by Zhang, Yue.

“…For wire bonding integrated circuits, the state-of-art is 30 u.m fine pitch, and the position accuracy of material transmission for wire bonder is required to be 3.5 urn or less. …”
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Experimental observation of optical Weyl points and Fermi arc-like surface states by Chong, Yi Dong, Chen, Kevin P., Rechtsman, Mikael C., Noh, Jiho, Huang, Sheng, Leykam, Daniel

“…Weyl fermions are hypothetical two-component massless relativistic particles in three-dimensional (3D) space, proposed by Hermann Weyl in 1929. Their band-crossing points, called ‘Weyl points’, carry a topological charge and are therefore highly robust. …”
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Higher-order Dirac semimetal in a photonic crystal by Wang, Zihao, Liu, Dongjue, Teo, Hau Tian, Wang, Qiang, Xue, Haoran, Zhang, Baile

“…Numerical results on the band structure show that the designed three-dimensional photonic crystal is able to host two fourfold Dirac points, which are connected in the momentum-space projections via higher-order hinge states localized at the hinge. …”
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TEM image simulation of silicon carbide using multislice technique by Saw, Ann Nee.

“…CTF plot is consider optimal when it remains almost constant close to -1, it indicates broad band of good transmittance. The intensity graph is plotted to determine the optimal thickness of crystal sample for HRTEM image. …”
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Design of optical building blocks for photonic integration by Chin, Mee Koy.

“…This non-overlapping property can be used to realize the "near-ideal" filter with flat and sharp passband, negligible sidelobes in the stop bands, and linear phase response over 80% of the passband. …”
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Recent progress on transition metal diselenides from formation and modification to applications by Zhao, Yuhan, Yan, Yibo, Lee, Jong-Min

“…For instance, transition metal diselenides (e.g., MoSe2) have a more stable 1T phase, larger interlayer spacing, smaller band gap, and more obvious metallic property of Se than TMDCs (e.g., MoS2). …”
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