Results 101 to 110 of about 6,279,893 (294)

Lone‐Pair‐Induced Lattice Distortion in Lead‐Free Hybrid Perovskites for High‐Performance Nanogenerators

Advanced Functional Materials, EarlyView.
A lead‐free tin‐based hybrid perovskite is designed in which stereochemically active lone‐pair electrons on tin distort the crystal lattice and break its symmetry. Blended into a flexible polymer, the material converts pressure into electricity at milliwatt‐scale power density and continues working far below freezing, powering a commercial wristwatch ...
Majid Haji Bagheri, Asif Abdullah Khan, Md Fahim Al Fattah, Mahmoud Almadhoun, Shamaila Shahzadi, Aixi Pan, Md Soyaeb Hasan, Henry Wu, Arash Aghigh, Bhawna Bhawna, François Légaré, Vivek Maheshwari, Dayan Ban   +12 more
wiley   +1 more source

Self‐Powered, Ultra‐Sensitive InGaAs/ITO Nanowire Radial Junction Infrared Photodiode for Low Flux Imaging at Room Temperature

Advanced Functional Materials, EarlyView.
This study reports a self‐powered InGaAs nanowire photodetector achieving single‐photon‐level sensitivity in the shortwave infrared at non‐cryogenic temperatures. The device demonstrates high‐speed imaging capabilities even under extremely low‐flux conditions.
Kosala Dhanawansha, Chaohao Chen, Zhe Li, Tuomas Haggren, Dawei Liu, Yang Yu, Baolei Liu, Sanjay Krishna, Hark H. Tan, Chennupati Jagadish, Lan Fu   +10 more
wiley   +1 more source

Cavity QED with Multilevel Atoms [PDF]

, 2005
The steady-state transmission spectrum of a cavity with two modes of orthogonal polarization strongly coupled to a single atom with multiple Zeeman states is computed. Effects due to cavity birefringence and atomic ac-Stark shifts are included.
Birnbaum, Kevin Michael
core   +1 more source

Multidimensional‐Encoded High‐Fidelity Spectrometers With a Floating‐Base Bipolar Junction

Advanced Functional Materials, EarlyView.
A floating‐base bipolar junction photodetector enables multidimensional spectral encoding through synergistic gate‐ and drain‐bias modulation of interfacial barrier matching. The resulting complementary spectral responses form a diverse, weakly correlated response matrix, enabling robust and high‐fidelity spectral reconstruction even at sub‐nanoampere ...
Sang‐Hyeon Lee, Junho Min, Yonas Tsegaye Megra, Min‐Hye Jeong, Hwi Je Woo, Jaewon Han, Junheon Ha, Gyunghyun Jang, Young Jae Song, Hyun‐Soo Ra, Hoon Hahn Yoon, Jong‐Soo Lee   +11 more
wiley   +1 more source

Non-linear optical properties of excitonic complexes in prolate ellipsoidal quantum dot

Results in Optics
This study presents a theoretical study of ground-state exciton and biexciton properties in strongly prolate ellipsoidal GaAs quantum dot. Using a variational approach with trial wave functions constructed from single-particle states, we examine the ...
Y.Y. Bleyan, M.Y. Vinnichenko, N. Zeiri, C.A. Duque, D.B. Hayrapetyan   +4 more
doaj   +1 more source

Absorption spectroscopy at the ultimate quantum limit from single-photon states

New Journal of Physics, 2017
Absorption spectroscopy is routinely used to characterise chemical and biological samples. For the state-of-the-art in laser absorption spectroscopy, precision is theoretically limited by shot-noise due to the fundamental Poisson-distribution of photon ...
R Whittaker, C Erven, A Neville, M Berry, J L O’Brien, H Cable, J C F Matthews   +6 more
doaj   +1 more source

Single photon pulse induced transient entanglement force

New Journal of Physics, 2020
We show that a single photon pulse incident on two interacting two-level atoms induces a transient entanglement force between them. After absorption of a multi-mode Fock state pulse, the time-dependent atomic interaction mediated by the vacuum ...
Li-Ping Yang, Chinmay Khandekar, Tongcang Li, Zubin Jacob   +3 more
doaj   +1 more source

Insulating‐Passivating Interfaces for Narrow‐Bandgap Tin‐Lead Perovskites Enable High‐Photovoltage in Single‐ and Double‐Junction Solar Cells

Advanced Functional Materials, EarlyView.
Combining field‐effect surface passivation of a narrow‐bandgap tin–lead perovskite by diammonium ions with introducing oleyl‐based amphiphiles to create insulating interface layers between the absorber and the adjacent hole and electron transporting layers increases the open‐circuit voltage to 91.5% of the detailed‐balance limit and enhances the power ...
Vishnu Vijayakumar, Christ H. L. Weijtens, Laura Bellini, Nick R. M. Schipper, Isabella Taupitz, Maxim Simmonds, Johannes C. Lambooij, Anuja Vijayan, Lana M. Kessels, Simon V. Quiroz Monnens, Guus J. W. Aalbers, Willemijn H. M. Remmerswaal, Stefan C. J. Meskers, Shuaifeng Hu, Junke Wang, Martijn M. Wienk, Henry J. Snaith, Steve Albrecht, René A. J. Janssen   +18 more
wiley   +1 more source

Theoretical Analysis of Interband Single-Photon Light Absorption in Semiconductors: Effects of Valence-Conduction Band Mixing and Temperature-Dependent Bandgap

East European Journal of Physics
This study presents a theoretical analysis of the spectral and temperature dependence of the single-photon absorption coefficient for linearly and circularly polarized light in semiconductors with diamond and zinc blende lattice structures.
Rustam Y. Rasulov, Vokhob R. Rasulov, Nurillo U. Kodirov, Mardonbek Kh. Nasirov, Iqbol M. Eshboltaev   +4 more
doaj   +1 more source

Experiments in Cavity QED: Exploring the Interaction of Quantized Light with a Single Trapped Atom [PDF]

, 2005
The experiments discussed in this thesis focus on the interaction of a single trapped atom with the single mode of a high-finesse optical cavity, in the regime of strong coupling.
Boca, Andreea
core   +1 more source