Ultrafast All‐Optical Logic Gates in Quasi‐2D Perovskites DOI Open Access
Yulan Fu, Yi Zhang, Yiwei Zhang

и другие.

Advanced Optical Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 7, 2024

Abstract Quasi‐2D perovskites are widely used in solar cells, photodetectors, and light‐emitting diodes (LEDs) due to their excellent optoelectronic properties stability. However, much fewer all‐optical devices realized based on quasi‐2D perovskites. Although have large nonlinear optical coefficients, the relaxation progress of excitons carriers will slow down response time reduce signal contrast devices. In this paper, exciton dynamics investigated under off‐resonance excitation perovskite PEA 2 (FAPbBr 3 ) PbBr 4 . The spin‐selective Stark effect (OSE) is observed through circularly polarized transient absorption measurements, a shift 3.3 meV achieved 1.11 eV excitation. hot‐biexciton cooling process induced by two‐photon also observed. A spin‐based XNOR gate demonstrated with ≈180 fs, logical enhanced competition OSE effect.

Язык: Английский

Recent advances and challenges of perovskite materials-based saturable absorbers for short-pulsed lasers DOI
Muhammad Sohail, M. Shareef, Bowen Li

и другие.

Infrared Physics & Technology, Год журнала: 2024, Номер 139, С. 105306 - 105306

Опубликована: Апрель 8, 2024

Язык: Английский

Процитировано

6
Ultrafast Four‐Wave Mixing Phase‐Matched by Transient Nonlinear Phase Modulation in a MAPbBr3 Single Crystal DOI

Jiahui Ren,

Xinping Zhang

Laser & Photonics Review, Год журнала: 2024, Номер unknown

Опубликована: Сен. 3, 2024

Abstract A degenerated four‐wave‐mixing (FWM) process in single‐crystal (CH 3 NH )PbBr (MAPbBr ) is reported, where 150‐fs laser pulses at 1.33 µm are employed as the pump. Two pump photons interact with a single crystal, producing another two higher and lower energies, respectively. One of FWM‐generation sidebands tuned from ∼1.23 to 1.21 other ∼1.43 1.48 for center wavelength, fluence increased 2.6 11.69 mJ cm −2 . The self‐phase modulation induced by strong through optical Kerr effect responsible tuning dynamics. Transient spectroscopy not only verifies FWM scheme interacting waves but also reveals interference dynamics between FWM‐generated probe pulse. In particular, angular dependence generation supplies direct evidence phase‐matching geometry. Using experimental data, nonlinear refractive index coefficient 1.19 × 10 −14 2 W −1 MAPbBr determined.

Язык: Английский

Процитировано

0
Ultrafast All‐Optical Logic Gates in Quasi‐2D Perovskites DOI Open Access
Yulan Fu, Yi Zhang, Yiwei Zhang

и другие.

Advanced Optical Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 7, 2024

Abstract Quasi‐2D perovskites are widely used in solar cells, photodetectors, and light‐emitting diodes (LEDs) due to their excellent optoelectronic properties stability. However, much fewer all‐optical devices realized based on quasi‐2D perovskites. Although have large nonlinear optical coefficients, the relaxation progress of excitons carriers will slow down response time reduce signal contrast devices. In this paper, exciton dynamics investigated under off‐resonance excitation perovskite PEA 2 (FAPbBr 3 ) PbBr 4 . The spin‐selective Stark effect (OSE) is observed through circularly polarized transient absorption measurements, a shift 3.3 meV achieved 1.11 eV excitation. hot‐biexciton cooling process induced by two‐photon also observed. A spin‐based XNOR gate demonstrated with ≈180 fs, logical enhanced competition OSE effect.

Язык: Английский

Процитировано

0