Hostname: page-component-76fb5796d-zzh7m Total loading time: 0 Render date: 2024-04-27T01:40:47.569Z Has data issue: false hasContentIssue false
  • English
  • Français

Transmission enhancement of subwavelength grating microlens by tapered nanostructure

Published online by Cambridge University Press:  23 April 2018

Mao Ye Open the ORCID record for Mao Ye [Opens in a new window] ,
Xiaopeng Guo  and
Yasha Yi
Mao Ye
Affiliation:
Integrated Nano Optoelectronics Laboratory, University of Michigan, 4901 Evergreen Road, Dearborn, Michigan 48128, USA
Xiaopeng Guo
Affiliation:
Integrated Nano Optoelectronics Laboratory, University of Michigan, 4901 Evergreen Road, Dearborn, Michigan 48128, USA
Yasha Yi*
Affiliation:
Integrated Nano Optoelectronics Laboratory, University of Michigan, 4901 Evergreen Road, Dearborn, Michigan 48128, USA Energy Institute, University of Michigan, 2301 Bonisteel Blvd., Ann Arbor, Michigan 48109, USA
*
Address all correspondence to Yasha Yi at yashayi@umich.edu
Get access

Abstract

The emerging planar subwavelength microlens has attracted wide attention recently. There exists a trade-off in the selection of phase shifter materials for the lens designed with linearly polarized incidence. In this work, we have discovered that it is possible to utilize tapered nanostructure to increase the transmission of phase shifters built with high refractive index materials. A typical grating microlens is demonstrated to examine the effectiveness of taper-enhancement effect—the focus efficiency is increased from 9% to 28% with the properly designed tapered sidewall. Our work will provide a novel method to enhance performance using high refractive index materials in the emerging microlens field.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 2 , June 2018 , pp. 509 - 513
Check for updates
Copyright
Copyright © Materials Research Society 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Jahani, S. and Jacob, Z.: All dielectric metamaterials. Nat. Nanotechnol. 11, 23–36 (2016).Google Scholar
2.Chang-Hasnain, C.J.: High-contrast gratings as a new platform for integrated optoelectronics. Semicond. Sci. Technol. 26, 014043 (2011).CrossRefGoogle Scholar
3.He, S., Wang, Z., Liu, Q., and Wang, W.: Study of focal shift effect in planar GaN high contrast grating lenses. Opt. Express 23, 29360–29368 (2015).Google Scholar
4.West, P.R., Stewart, J.L., Kildishev, A.V., Shalaev, V.M., Shkunov, V.V., Strohkendl, F., Zakharenkov, Y.A., Dodds, R.K., and Byren, R.: All-dielectric subwavelength metasurface focusing lens. Opt. Express 22, 26212–26221 (2014).CrossRefGoogle ScholarPubMed
5.Duan, X., Zhou, G., Huang, Y., Shang, Y., and Ren, X.: Theoretical analysis and design guideline for focusing subwavelength gratings. Opt. Express 23, 2639–2646 (2015).CrossRefGoogle ScholarPubMed
6.Fattal, D., Li, J., Peng, Z., Fiorentino, M., and Beausoleil, R.G.: Flat dielectric grating reflectors with focusing abilities. Nat. Photonics 4, 466–470 (2010).Google Scholar
7.Lu, F., Sedgwick, F.G., Karagodsky, V., Chase, C., and Chang-Hasnain, C.J.: Planar high-numerical-aperture low-loss focusing reflectors and lenses using subwavelength high contrast gratings. Opt. Express 18, 12606–12614 (2010).CrossRefGoogle ScholarPubMed
8.Ye, M. and Yi, Y.: Influence of grating thickness in low-contrast subwavelength grating concentrating lens. Opt. Eng. 55, 075102 (2016).CrossRefGoogle Scholar
9.Wang, Y., Miao, J., Tian, Y., Guo, C., Zhang, J., Ren, T., and Liu, Q.: TiO2 micro-devices fabricated by laser direct writing. Opt. Express 19, 17390–17395 (2011).CrossRefGoogle ScholarPubMed
10.Asadollahbaik, A., Boden, S.A., Charlton, M.D.B., Payne, D.N.R., Cox, S., and Bagnall, D.M.: Reflectance properties of silicon moth-eyes in response to variations in angle of incidence, polarization and azimuth orientation. Opt. Express 22, A402–A415 (2014).Google Scholar
11.Pignalosa, P., Liu, B., Chen, H., and Yi, Y.: Giant light extraction enhancement of medical imaging scintillation materials using bio inspired integrated nano structures. Opt. Lett. 37, 2808 (2012).CrossRefGoogle Scholar
12.Saffih, F., Con, C., Alshammari, A., Yavuz, M., and Cui, B.: Fabrication of silicon nano structures with large taper angle by reactive ion etching. J. Vac. Sci. Technol. B 32, 06FI104-1 (2014).CrossRefGoogle Scholar
13.Ye, M. and Yi, Y.S.: Subwavelength grating microlens with taper-resistant characteristics. Opt. Lett. 42, 1031–1034 (2017).CrossRefGoogle ScholarPubMed