Results 21 to 30 of about 461,573 (294)
Crystals, 2021 An efficient enhancement of 2.78 μm emission from the transition of Er3+: 4I11/2 → 4I13/2 by Tm3+ introduction in the Er/Tm: PbF2 crystal was grown by the Bridgman technique for the first time. The spectroscopic properties, energy transfer mechanism, and
Jiayu Liao +10 more
doaj +1 more source
Two-photon absorption in microcavities for optical autocorrelation and sampling [PDF]
, 2003 We have designed novel semiconductor microcavity structures for the enhancement of the two-photon absorption (TPA) photocurrent. We report a TPA autocorrelation technique for short optical pulses that uses the microcavity structure instead of a second ...
Barry, Liam P. +7 more
core +1 more source
Ultra-narrow Band Perfect Absorber and Its Application as Plasmonic Sensor in the Visible Region
Nanoscale Research Letters, 2017 We propose and numerically investigate a perfect ultra-narrowband absorber with an absorption bandwidth of only 1.82 nm and an absorption efficiency exceeding 95% in the visible region.
Dong Wu +8 more
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Design of a 0.13 µm SiGe Limiting Amplifier with 14.6 THz Gain-Bandwidth-Product [PDF]
Advances in Radio Science, 2017 This paper presents the design of a limiting amplifier with 1-to-3 fan-out implementation in a 0.13 µm SiGe BiCMOS technology and gives a detailed guideline to determine the circuit parameters of the amplifier for optimum high-frequency performance ...
S. Park +3 more
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Nanoscale Research Letters, 2018 Plasmonic metasurfaces have attracted much attention in recent years owing to many promising prospects of applications such as polarization switching, local electric field enhancement (FE), near-perfect absorption, sensing, slow-light devices, and ...
Dong Wu +9 more
doaj +1 more source
Fully integrated high quality factor GmC bandpass filter stage with highly linear operational transconductance amplifier [PDF]
Advances in Radio Science, 2017 This paper presents an electrical, fully integrated, high quality (Q) factor GmC bandpass filter (BPF) stage for a wireless 27 MHz direct conversion receiver for a bendable sensor system-in-foil (Briem et al., 2016).
J. Briem +6 more
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Flip-OFDM for Optical Wireless Communications [PDF]
, 2011 We consider two uniploar OFDM techniques for optical wireless communications: asymmetric clipped optical OFDM (ACO-OFDM) and Flip-OFDM. Both techniques can be used to compensate multipath distortion effects in optical wireless channels. However, ACO-OFDM
Fernando, Nirmal +2 more
core +3 more sources
Tera-sample-per-second arbitrary waveform generation in a synthetic dimension
Communications Physics, 2023 Synthetic dimension opens new horizons in quantum physics and topological photonics by enabling new dimensions for field and particle manipulations.
Yiran Guan +8 more
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LD-Pumped Random Fiber Laser Based on Erbium-Ytterbium Co-Doped Fiber
Photonic Sensors, 2019 In this paper, a cladding-pumped erbium-ytterbium co-doped random fiber laser (EYRFL) operating at 1550 nm with high power laser diode (LD) is proposed and experimentally demonstrated for the first time.
Qingyang Meng +4 more
doaj +1 more source
Silicon-Based Metastructure Optical Scattering Multiply–Accumulate Computation Chip
Nanomaterials, 2022 Optical neural networks (ONN) have become the most promising solution to replacing electronic neural networks, which have the advantages of large bandwidth, low energy consumption, strong parallel processing ability, and super high speed.
Xu Liu +10 more
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