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Related Experiment Video

Updated: Jun 20, 2026

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

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Published on: February 25, 2017

Far-Field Directionality Control of Coupled InP Nanowire Lasers.

Lukas R Jäger^1,2, Wei Wen Wong², Carsten Ronning¹

¹Institute of Solid State Physics, Friedrich Schiller University Jena, Max-Wien-Platz 1, 07743 Jena, Germany.

|September 17, 2025

Summary

This summary is machine-generated.

Engineered indium phosphide nanowire (NW) lasers offer controlled light emission directionality. This breakthrough enables on-chip optical communication and imaging by precisely tuning NW coupling for beam steering applications.

Keywords:

InP nanowires directional lasing emission coupling nano lasers selective area epitaxy

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Area of Science:

Semiconductor Nanostructures
Optoelectronics
Photonics

Background:

Nanowire (NW) lasers are key for compact, coherent on-chip light sources.
Controlling emission directionality in NW lasers is challenging due to fabrication complexities.
Existing methods often require post-epitaxy manipulation, limiting integration.

Purpose of the Study:

To demonstrate spatially engineered far-field emission from vertically emitting InP NW lasers.
To achieve controlled directionality without post-epitaxy transfer or alignment.
To explore NW arrangements for advanced beam steering functionalities.

Main Methods:

Site-selective growth of InP NWs.
Precise control of optical coupling between NWs.
Design and fabrication of NW pairs and triplets.
Tuning inter-NW gap to modify lasing modes (TE01).
Numerical simulations for far-field profile analysis.

Main Results:

Achieved spatially engineered far-field emission from InP NW lasers.
Demonstrated transformation of far-field profiles (doughnut to double-lobed) by tuning coupling gap.
NW pairs and triplets lasing in the TE01 mode were successfully grown.
Numerical studies confirmed enhanced directionality in periodic NW arrays.

Conclusions:

Precise optical coupling of site-selective NWs enables controlled emission directionality.
This method provides a foundation for integrated coherent light generation and beam steering.
Engineered NW metasurfaces show potential for directional lasing applications.