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Shear on the Horizontal Face of a Beam Element01:16

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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Real-time beam shaping without additional optical elements.

Felix Fries1, Markus Fröbel1, Pen Yiao Ang1

  • 1Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, Nöthnitzer Straße 61, Dresden, 01187 Germany.

Light, Science & Applications
|March 7, 2019
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Summary
This summary is machine-generated.

Researchers developed organic light-emitting diodes (OLEDs) for real-time beam shape control without external optics. This innovation allows continuous tuning of light emission direction while maintaining high efficiency.

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Area of Science:

  • Solid State Physics
  • Condensed Matter Physics
  • Semiconductor Physics

Background:

  • Artificial light sources are crucial in various physics fields.
  • Improving luminous efficiency, lifetime, and color stability of light sources is an ongoing research area.
  • Current light sources often lack the adaptability for sophisticated applications, necessitating beam shaping.

Purpose of the Study:

  • To demonstrate real-time beam shape regulation in organic light-emitting diodes (OLEDs).
  • To eliminate the need for secondary optical elements and mechanical adjustments for beam shaping.
  • To achieve continuous tunability of light emission characteristics directly from the light source.

Main Methods:

  • Utilized a two-unit organic light-emitting diode (OLED) architecture for red light emission.
  • Investigated the ability to continuously tune the beam emission from forward to sideward.
  • Measured external quantum efficiency across different beam shape settings.

Main Results:

  • Demonstrated real-time, continuous tuning of beam shape in OLEDs without secondary optics or mechanical parts.
  • Achieved tunability between strongly forward and strongly sideward emission.
  • Maintained application-relevant external quantum efficiency between 6% and 8% across all settings.

Conclusions:

  • OLEDs can intrinsically control beam shape in real-time, offering a novel approach to light source design.
  • This technology enables customizable and tunable lighting systems originating from the light source itself.
  • The findings pave the way for more adaptable and integrated lighting solutions in advanced applications.