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Beam Steering with a Nonlinear Optical Phased Array Antenna.

Sebastian Busschaert1, Nikolaus Flöry1, Sotirios Papadopoulos1

  • 1Photonics Laboratory , ETH Zürich , 8093 Zürich , Switzerland.

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|August 20, 2019
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Summary
This summary is machine-generated.

Researchers controlled nonlinear light emission from molybdenum disulfide (MoS2) monolayers using optical phased arrays. This breakthrough enables tunable directional emission for advanced optoelectronic devices.

Keywords:
LIDARNonlinear opticsTMDCbeam steeringoptical interconnectsphased array antennasecond harmonic generation

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Transition metal dichalcogenides (TMDCs), like molybdenum disulfide (MoS2), show strong second harmonic (SH) generation due to their unique crystal structure and electronic properties in monolayer form.
  • Controlling the direction of SH emission is crucial for applications but challenging due to the need to manage nonlinear polarization phase.

Purpose of the Study:

  • To demonstrate controllable steering of nonlinear optical emission from a monolayer MoS2.
  • To integrate the SH generation of TMDCs with optical phased array antennas for directional control.

Main Methods:

  • Coupling the intrinsic SH response of a monolayer MoS2 to a custom-designed optical phased array antenna.
  • Utilizing the phased array's capability to control the phase of emitted light to steer the nonlinear signal.

Main Results:

  • Achieved controllable, directional steering of the second harmonic emission from the MoS2 monolayer.
  • Demonstrated uniform emission efficiency across a broad angular range by leveraging the phased array's intrinsic SH generation.

Conclusions:

  • The integration of TMDCs with optical phased arrays offers a novel method for controlling nonlinear optical emission directionality.
  • This approach paves the way for developing advanced optoelectronic applications, including programmable optical interconnects and on-chip LIDAR systems.