Results 111 to 120 of about 8,929 (287)

Etched distributed Bragg reflectors as three-dimensional photonic crystals: photonic bands and density of states

, 2002
The photonic band dispersion and density of states (DOS) are calculated for the three-dimensional (3D) hexagonal structure corresponding to a distributed Bragg reflector patterned with a 2D triangular lattice of circular holes. Results for the Si/SiO$_2$
A. Blanco, A. Fiore, E. Pavarini, E. Yablonovitch, E. Yablonovitch, G. Lehmann, H. Benisty, H.S. Sözüer, K. Busch, K. Sakoda, K.M. Ho, K.M. Ho, L. C. Andreani, M. Galli, M.S. Thijssen, O. Jepsen, O. Jepsen, P.L. Gourley, P.R. Villeneuve, R. Padjen, R.D. Meade, S. Fan, S. John, S.G. Johnson, W.M. Robertson, Y.A. Vlasov   +25 more
core   +1 more source

Self‐Hybridized Exciton‐Polariton Photodetectors From Layered Metal‐Organic Chalcogenolates

Advanced Functional Materials, EarlyView.
Self‐hybridized exciton‐polariton photodetectors are demonstrated using high refractive index mithrene, eliminating the need for top mirrors. This simplified architecture enables tunable sub‐bandgap photodetection via lower exciton‐polariton states and enhanced carrier transport through ultrafast polariton group velocities.
Bongjun Choi, Adam D. Alfieri, Wangleong Chen, Deep Jariwala   +3 more
wiley   +1 more source

Halide‐Dependent Photoluminescence and Heavy‐Atom Effects in Low‐Melting Organic–Inorganic Manganese Halides

Advanced Functional Materials, EarlyView.
Two pyridinium‐based ionic liquid templated hybrid manganese halides, (C4Py)2[MnCl4] and (C4Py)2[MnBr4], display similar bulk structures but show significantly different photoluminescence behaviors due to the bromine heavy‐atom effect. Their stable local Mn environments remain intact even in the molten state, allowing applications such as luminescence ...
Biswajit Bhattacharyya, Christian Balischewski, Jiyong Kim, Tiago Duarte, Lianshe Fu, Rute A.S. Ferreira, Alkit Beqiraj, Iuliia Mikulska, Diego Gianolio, Eric Sperlich, Felix Stete, Wouter Koopman, Christina Günter, Katlen Brennenstuhl, Daniel Van Opdenbosch, Cordt Zollfrank, Armin Wedel, Beth J. Murray, Małgorzata Swadźba‐Kwaśny, Tillmann Klamroth, Michael U. Kumke, Verónica de Zea Bermudez, Andreas Taubert   +22 more
wiley   +1 more source

Developing Solution-Processed Distributed Bragg Reflectors for Microcavity Polariton Applications. [PDF]

J Phys Chem C Nanomater Interfaces, 2023
Palo E, Papachatzakis MA, Abdelmagid A, Qureshi H, Kumar M, Salomäki M, Daskalakis KS.   +6 more
europepmc   +1 more source

LL‐37 Driven Phase Transition and Stacking in Oligolamellar Gram‐Negative Bacterial Membrane Models

Advanced Functional Materials, EarlyView.
This work establishes oligolamellar bacterial membrane models to investigate how LL‐37 disrupts the complex dual‐bilayer architecture of Gram‐negative bacteria. Combining SAXS, cryo‐TEM, electrophoretic mobility measurements, and coarse‐grained simulations, it reveals cardiolipin‐driven phase transitions leading to bicelle‐like structures and membrane ...
Bettina Tran, Diane C.A. Lima, Linda Sandblad, Madeleine Ramstedt, Thereza A. Soares, Stefan Salentinig   +5 more
wiley   +1 more source

Notes on Evanescent Wave Bragg-Reflection Waveguides

, 2013
We investigate an extended version of the Bragg reflection waveguide (BRW) with air gaps as one of the layers. This design has the potential of drastically simplifying the epitaxial structure for integrated nonlinear optical elements at the expense of ...
Pressl, Benedikt, Weihs, Gregor
core   +1 more source

Investigation of Halogen Substitution Effects in π‐Conjugated Organic Ligands of Chiral Hybrid Perovskites on Their Chiroptical Activity

Advanced Functional Materials, EarlyView.
The role of novel thiophene‐based ligands with halogen substitutions in enhancing the chiroptical and optoelectronic properties of 2D chiral HOIPs has been investigated. By tailoring ligand design, enhanced CD and CPL properties are achieved, with improved CPL discrimination in photodetectors.
Boesung Kwon, Doyeong Yeo, In‐Chul Hwang, In Hwan Jung, Joon Hak Oh   +4 more
wiley   +1 more source

Polariton lasing in InGaN quantum wells at room temperature

Opto-Electronic Advances, 2019
In this paper, we report the exciton polaritons in both positive and negative detuning micro cavities based on InGaN multi-quantum wells (MQWs) and the first polariton lasing in InGaN/GaN MQWs at room temperature by utilizing a 4.5λ Fabry-Perot (F-P ...
Wu Jinzhao, Long Hao, Shi Xiaoling, Luo Song, Chen Zhanghai, Feng Zhechuan, Ying Leiying, Zheng Zhiwei, Zhang Baoping   +8 more
doaj   +1 more source

Optical engineering of PbS colloidal quantum dot solar cells via Fabry-Perot resonance and distributed Bragg reflectors. [PDF]

Nano Converg, 2023
Bae S, Duff M, Hong JY, Lee JK.
europepmc   +1 more source

Efficient single frequency fibre lasers using novel photosensitive Er/Yb optical fibres

, 1997
Boron- and germanium-doped highly photosensitive cladding is used in a novel design to achieve photosensitive Er/Yb-doped fibers, permitting short, strong gratings (length ~1cm, reflectivity >99%) to be written without hydrogenation.
Caplen, J.E., Dong, L., Hsu, K., Loh, W.H., Minelly, J.D., Reekie, L.   +5 more
core   +1 more source