Wide bandwidth and high resolution planar filter array based on DBR-metasurface-DBR structures
Abstract
We propose and experimentally demonstrate a planar array of optical bandpass filters composed of low loss dielectric metasurface layers sandwiched between two distributed Bragg reflectors (DBRs). The two DBRs form a Fabry-Pérot resonator whose center wavelength is controlled by the design of the transmissive metasurface layer which functions as a phase shifting element. We demonstrate an array of bandpass filters with spatially varying center wavelengths covering a wide range of operation wavelengths of 250nm around λ = 1550nm (Δλ/λ = 16%). The center wavelengths of each filter are independently controlled only by changing the in-plane geometry of the sandwiched metasurfaces, and the experimentally measured quality factors are larger than 700. The demonstrated filter array can be directly integrated on top of photodetector arrays to realize on-chip high-resolution spectrometers with free-space coupling.
Additional Information
© 2016 Optical Society of America. Received 12 Apr 2016; revised 10 May 2016; accepted 17 May 2016; published 19 May 2016. This work was supported by Samsung Electronics and Defense Advanced Research Projects Agency (DARPA). Y. H. was supported by a Japan Student Services Organization (JASSO) fellowship. S. M. K. was supported by the "Light-Material Interactions in Energy Conversion" Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award no. DE-SC0001293. The device nanofabrication was performed in the Kavli Nanoscience Institute at the California Institute of Technology.Attached Files
Published - OpticsExpress1677-1682.pdf
Submitted - 1604.03167v1.pdf
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Additional details
- Eprint ID
- 68801
- Resolver ID
- CaltechAUTHORS:20160701-085424564
- Samsung Electronics
- Defense Advanced Research Projects Agency (DARPA)
- Japan Student Services Organization (JASSO)
- Department of Energy (DOE)
- DE-SC0001293
- Created
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2016-07-01Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute