Optoelectronic Properties of Semiconductor Nanowires

Semiconductor nanowires combine quantum confinement, high surface‐to‐volume ratio and anisotropic geometry to deliver exceptional control over light–matter interactions. As wire diameters approach the exciton Bohr radius, discrete energy levels emerge, leading to size‐tunable bandgaps and enhanced radiative recombination. Their one‐dimensional geometry acts as an optical waveguide, permitting strong mode confinement and low‐loss propagation over micrometre distances. Surface states and heterostructured compositions can be engineered to tailor charge‐carrier dynamics, facilitating efficient photodetection, lasing and light emission. Dopant incorporation and deliberate surface modification further modulate electron–phonon coupling and trap‐state emission, while microcavity effects enable multi‐wavelength lasing in a single wire. Collectively, these features underpin a broad spectrum of applications spanning integrated photonic circuits, wavelength‐tunable lasers, high‐gain optical amplifiers and ultrasensitive photodetectors.

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Optoelectronic Properties of Semiconductor Nanowires publication trend

The graph below shows the total number of articles in optoelectronic properties of semiconductor nanowires across all publications each year (not limited to Nature Index journals).

Technical terms

Bandgap: Energy difference between valence and conduction bands that dictates absorption and emission wavelengths.

Quantum confinement: Restriction of charge carriers in dimensions comparable to their de Broglie wavelength, leading to discrete energy levels.

Exciton: Coulomb‐bound electron–hole pair whose radiative recombination yields photoluminescence.

Photoconductivity: Increase in electrical conductivity induced by photon absorption and generation of charge carriers.

Microcavity effect: Resonant optical feedback in a confined geometry that enhances emission at specific wavelengths.

References

1. Controllable Vapor Growth of Large-Area Aligned CdSxSe1−x Nanowires for Visible Range Integratable Photodetectors. Nano-Micro Letters (2018).
2. Photoluminescence and Boosting Electron–Phonon Coupling in CdS Nanowires with Variable Sn(IV) Dopant Concentration. Discover Nano (2021).
3. Wide spectrum multi-sub-band modulation of excitons and defect state emission simultaneously in surface oxidized CdS micro/nano-wires. AIP Advances (2020).