Category: Optoelectronics
Semiconductor grafting enables GaAs/GeSn-MQW/Ge photodiode integration
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What the study found A lattice-mismatched GaAs/GeSn-multi-quantum well (MQW)/Ge n-i-p heterojunction photodiode was realized using semiconductor grafting. The device showed a record-low dark current density, broad spectral response, and high photoresponsivity. Why the authors say this matters The authors conclude that this grafting approach provides a way to build optoelectronic heterojunctions without the usual strict…
Photonic chip synthesizes flexible millimeter-wave signals
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What the study found The study found that a silicon photonic chip paired with a reconfigurable optical frequency comb can synthesize millimeter-wave signals. The system supports on-chip filtering and modulation and can produce single-frequency, multi-frequency, and vector signals for arbitrary IQ signal construction. Why the authors say this matters The authors say photonics-assisted millimeter-wave and…
Low-footprint NIR spectroscopy enables quasi-simultaneous biosensing
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What the study found The study presents a near-infrared (NIR) multimodal, low-footprint spectroscopy setup that can measure NIR fluorescence and absorption. It also reports that the setup provides quasi-simultaneous access to both types of spectra. Why the authors say this matters The authors say NIR techniques are less widespread than visible-light methods because detectors, microscopes,…
EO comb system combines high-capacity transmission and sensitive sensing
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Integrated sensing and communication system using electro-optic comb and 7-core fiber achieves 10.56 Tbit/s transmission with acoustic sensing, eliminating crosstalk through polarization multiplexing.
