Laser-Based Solid State Lighting

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OPEN 2015
Santa Barbara, California
Project Term:
04/14/2016 - 10/13/2019

Technology Description:

The University of California, Santa Barbara (UCSB) will develop a gallium nitride (GaN) laser-based white light emitter with no efficiency droop at high current densities. The team's solution will address the efficiency and cost limitations of LEDs. Laser diodes do not suffer efficiency droop at high current densities, and this allows for the design of lamps using a single, small, light-emitting chip operating at high current densities. Using a single chip reduces system costs compared with LEDs because the system uses less material per chip, requires fewer chips, and employs simplified optics and a simplified heat-sink. The chip area required for LED technologies will be significantly reduced using laser-based solid state lighting. This technology will also enable highly controllable beams of light that cannot be achieved with LEDs. The goal of the project is to develop a 1,000 lumen laser-based white light emitter with the efficiency of at least 200 lm/W and a cost of $0.25/klm.

Potential Impact:

If successful, innovations from this project may dramatically improve lighting technology and lead to an estimated $4 billion in potential savings by 2020.


Expanded use of laser-based solid state lighting could reduce dependence on foreign sources of energy.


Laser-based solid state lighting would reduce the materials and energy required to produce an equal amount of light using current technologies.


Efficiency gains from the use of laser-based solid state lighting may lead to a 4x reduction in cost ($/klm) and $4 billion in potential savings from reduced electricity consumption.


ARPA-E Program Director:
Dr. James Zahler
Project Contact:
Prof. Shuji Nakamura
Press and General Inquiries Email:
Project Contact Email:

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