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Assembling Ordered Nanorod Superstructures and Their Application as Microcavity Lasers.

Pai Liu¹, Shalini Singh¹, Yina Guo²

¹Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.

Scientific Reports

|March 9, 2017

Summary

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This summary is machine-generated.

We developed ordered semiconductor nanorod arrays using electric field assembly. These ordered arrays show lower amplified spontaneous emission thresholds and higher optical gain compared to disordered ones.

Area of Science:

Materials Science
Optoelectronics
Nanotechnology

Background:

Semiconductor nanorods offer tunable optical properties.
Ordered nanostructures are crucial for efficient light emission and gain.
Previous methods struggled to achieve large-scale, ordered nanorod arrays.

Purpose of the Study:

To create highly ordered, multi-layered arrays of semiconductor nanorods.
To investigate the optical properties, specifically amplified spontaneous emission (ASE) and optical gain, of these ordered arrays.
To demonstrate the impact of structural order on emission efficiency.

Main Methods:

Electric field assisted assembly for vertically aligned nanorod formation.
Fabrication of close-packed, multi-layered nanorod arrays in perfect registry.

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Characterization of optical gain and ASE threshold in CdSe_xS_1-x nanorod emitters.

Main Results:

Successful formation of ordered, multi-layered semiconductor nanorod arrays.
Achieved a low amplified spontaneous emission (ASE) threshold.
Demonstrated high net optical gain at medium pump intensity.
Observed significantly lower ASE thresholds in ordered versus disordered samples.

Conclusions:

Electric field assisted assembly is effective for creating ordered nanorod arrays.
Structural order in nanorod arrays significantly enhances optical gain and lowers ASE thresholds.
Ordered CdSe_xS_1-x nanorod emitters show promise for optoelectronic applications.