Results 71 to 80 of about 14,612 (217)

Interfacial Engineering by Metallic Ions and Organic Ammonium Ligand Passivation for Perovskite Solar Cells

Advanced Science, EarlyView.
A synergistic approach using phenethylammonium iodide (PEAI) and antimony iodide (SbI3) enhances the operational stabilities of perovskite solar cells by providing p‐type doping effect, suitable band energy alignment, reduced defect density, and minimized surface ion vacancies in the perovskite films.
Abraham Adenle, Purevlkham Myagmarsereejid, Selengesuren Suragtkhuu, Tuul Tsagaantsooj, Solongo Purevdorj, Eric Campbell, Sina Jamali, Oisín E. FitzGerald, Taylor J. Z. Stock, Thomas J. Macdonald, Joseph F. S. Fernando, Hui Jin, Paul E. Shaw, Michitoshi Hayashi, Batjargal Sainbileg, Chihaya Adachi, Yu Lin Zhong, Munkhbayar Batmunkh   +17 more
wiley   +1 more source

Doubly resonant second-harmonic generation of a vortex beam from a bound state in the continuum

, 2020
Second harmonic generation in nonlinear materials can be greatly enhanced by realizing doubly-resonant cavities with high quality factors. However, fulfilling such doubly resonant condition in photonic crystal (PhC) cavities is a long-standing challenge,
Barone, Andrea, Carlin, Jean-François, Clementi, Marco, Fan, Shanhui, Galli, Matteo, Gerace, Dario, Grandjean, Nicolas, Houdré, Romuald, Minkov, Momchil, Wang, Jun   +9 more
core   +1 more source

Ultraviolet photonic crystal laser [PDF]

, 2004
We fabricated two dimensional photonic crystal structures in zinc oxide films with focused ion beam etching. Lasing is realized in the near ultraviolet frequency at room temperature under optical pumping.
Cao, H., Chang, R. P. H., Dravid, V. P., Li, S., Liu, X., Wu, X., Yamilov, A.   +6 more
core   +3 more sources

Topological Materials and Related Applications

Advanced Electronic Materials, EarlyView.
This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti, Roberto Mantovan, Emanuele Longo, Harold J. W. Zandvliet, Pantelis Bampoulis, Yu Pan, Fan Li, Xia Wang, Payton Downey, Alessandro Molle   +9 more
wiley   +1 more source

Effects of hydrostatic pressure on an L1 and L3 cavity of a photonic slab

Materials Research Express, 2020
In this work, we used the guided-mode expansion method to calculate the photonic band dispersion in two-dimensional photonic crystal slabs. The photonic lattice is hexagonal, composed of air holes with a circular cross-section.
Francis Segovia-Chaves, Herbert Vinck-Posada   +1 more
doaj   +1 more source

Label-Free Monitoring of Diffusion in Microfluidics

Micromachines, 2017
Label-free, real-time detection of concentration gradients is demonstrated in a microfluidic H-filter, using an integrated photonic crystal slab sensor to monitor sample refractive index with spatial resolution.
Kristian Tølbøl Sørensen, Anders Kristensen   +1 more
doaj   +1 more source

General Recipe for Designing Photonic Crystal Cavities [PDF]

, 2005
We describe a general recipe for designing high-quality factor (Q) photonic crystal cavities with small mode volumes. We first derive a simple expression for out-of-plane losses in terms of the k-space distribution of the cavity mode.
Englund, Dirk, Fushman, Ilya, Vuckovic, Jelena   +2 more
core   +1 more source

Spontaneous emission rates of dipoles in photonic crystal membranes

, 2005
We show theoretically that finite two-dimensional (2D) photonic crystals in thin semiconductor membranes strongly modify the spontaneous emission rate of embedded dipole emitters.
A. Femius Koenderink, Akahane, Amos, Asatryan, Buchler, Busch, Busch, Bykov, Chew, Cornelius, Costas M. Soukoulis, Daubechies, Drexhage, Englund, Fan, Fujita, Fussell, Gilat, Hermann, Hess, Ho, Hwang, Khosravi, Kien, Klimov, Koenderink, Koenderink, Koenderink, Kress, Lee, Li, Lodahl, Maria Kafesaki, Monkhorst, Ogawa, Okano, Olk, Painter, Schniepp, Shung, Snoeks, Sprik, Srinivasan, Suzuki, Urbach, Vahala, Vahid Sandoghdar, Vlasov, Vos, Wang, Xu, Yablonovitch, Yanik, Yoshie   +53 more
core   +1 more source

Synergistic Engineering of Oxygen Vacancies and Topological Surface States in Bi2Te3/TiO2‐X Heterostructures for Highly Efficient Photothermal‐Driven CO2 Photoreduction

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Integrating the topological insulator Bi2Te3 with oxygen‐deficient TiO2‐X creates a synergistic platform for full‐spectrum CO2 reduction, achieving high‐selectivity C2+ production via enhanced photothermal catalysis and tailored charge dynamics.
Bingke Zhang, Chenchen Zhao, Jing Qiao, Changcun Li, Yang Wang, Xingshuo Liu, Dongbo Wang, Gang Liu, Zhao Qian, Rajeev Ahuja, Jinzhong Wang, Degang Zhao   +11 more
wiley   +1 more source

On-chip room-temperature CW lasing from a III–V nanowire integrated with a Si photonic crystal platform [PDF]

APL Photonics
We report the demonstration of continuous-wave (CW) lasing at room temperature from a III–V semiconductor nanowire integrated into a Si photonic crystal (PhC) cavity. Previous hybrid nanowire lasers [M.
Masato Takiguchi, Takuro Fujii, Hisashi Sumikura, Akihiko Shinya, Shinji Matsuo, Masaya Notomi   +5 more
doaj   +1 more source