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- Chung, Kunook
- Mixed Dimensional Materials and Devices Lab.
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Integrated parabolic nanolenses on MicroLED color pixels
- Author(s)
- Demory, Brandon, Chung, Kunook, Katcher, Adam, Sui, Jingyang, Deng, Hui, Ku, Pei-Cheng
- Issued Date
- 2018-04
- Citation
- NANOTECHNOLOGY, v.29, no.16, pp.165201
- Abstract
- A parabolic nanolens array coupled to the emission of a nanopillar micro-light emitting diode (LED) color pixel is shown to reduce the far field divergence. For a blue wavelength LED, the total emission is 95% collimated within a 0.5 numerical aperture zone, a 3.5x improvement over the same LED without a lens structure. This corresponds to a half-width at half-maximum (HWHM) line width reduction of 2.85 times. Using a resist reflow and etchback procedure, the nanolens array dimensions and parabolic shape are formed. Experimental measurement of the far field emission shows a HWHM linewidth reduction by a factor of 2x, reducing the divergence over the original LED.
- Publisher
- IOP PUBLISHING LTD
- ISSN
- 0957-4484
- Keyword (Author)
- microdisplay, beam shaping, light-emitting diodes
- Keyword
- TECHNOLOGY, EMISSION, COMPACT, DISPLAY
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