TY - JOUR
T1 - Ultrathin Broadband Metasurface Superabsorbers from a van der Waals Semimetal
AU - Alfieri, Adam D.
AU - Motala, Michael J.
AU - Snure, Michael
AU - Lynch, Jason
AU - Kumar, Pawan
AU - Zhang, Huiqin
AU - Post, Susanna
AU - Bowen, Timothy
AU - Muratore, Christopher
AU - Robinson, Joshua A.
AU - Hendrickson, Joshua R.
AU - Glavin, Nicholas R.
AU - Jariwala, Deep
N1 - Funding Information:
D.J., A.D.A., and J.L. acknowledge primary support for this work by the Asian Office of Aerospace Research and Development (AOARD) of the Air Force Office of Scientific Research (AFOSR) FA2386‐20‐1‐4074 and FA2386‐21‐1‐4063. D.J. also acknowledges partial support from the University Research Foundation at Penn and the Alfred P. Sloan Foundation for the Sloan Fellowship. D.J., P.K. and H. Z. acknowledge support from the National Science Foundation (NSF) (grant no. DMR‐1905853) and support from University of Pennsylvania Materials Research Science and Engineering Center (MRSEC) (grant no. DMR‐1720530) in addition to usage of MRSEC supported facilities. The sample fabrication, assembly, and characterization were carried out at the Singh Center for Nanotechnology at the University of Pennsylvania, which is supported by the NSF National Nanotechnology Coordinated Infrastructure Program grant no. NNCI1542153. H.Z. was partially supported by Vagelos Institute of Energy Science and Technology graduate fellowship. J.R.H. acknowledges support from the Air Force Office of Scientific Research (Program Manager Dr. Gernot Pomrenke) under award number FA9550‐20RYCOR059. M. S. and N. R. G. acknowledge support from the Air Force Office of Scientific Research under Award No. FA9550‐ 19RYCOR050. J.A.R. and T.B. acknowledge funding through NSF‐DMR Grant 2202280 and AFOSR contract FA9550‐19‐1‐0295. Dr. Evan Smith helped with preliminary ellipsometry measurements.
Funding Information:
D.J., A.D.A., and J.L. acknowledge primary support for this work by the Asian Office of Aerospace Research and Development (AOARD) of the Air Force Office of Scientific Research (AFOSR) FA2386-20-1-4074 and FA2386-21-1-4063. D.J. also acknowledges partial support from the University Research Foundation at Penn and the Alfred P. Sloan Foundation for the Sloan Fellowship. D.J., P.K. and H. Z. acknowledge support from the National Science Foundation (NSF) (grant no. DMR-1905853) and support from University of Pennsylvania Materials Research Science and Engineering Center (MRSEC) (grant no. DMR-1720530) in addition to usage of MRSEC supported facilities. The sample fabrication, assembly, and characterization were carried out at the Singh Center for Nanotechnology at the University of Pennsylvania, which is supported by the NSF National Nanotechnology Coordinated Infrastructure Program grant no. NNCI1542153. H.Z. was partially supported by Vagelos Institute of Energy Science and Technology graduate fellowship. J.R.H. acknowledges support from the Air Force Office of Scientific Research (Program Manager Dr. Gernot Pomrenke) under award number FA9550-20RYCOR059. M. S. and N. R. G. acknowledge support from the Air Force Office of Scientific Research under Award No. FA9550- 19RYCOR050. J.A.R. and T.B. acknowledge funding through NSF-DMR Grant 2202280 and AFOSR contract FA9550-19-1-0295. Dr. Evan Smith helped with preliminary ellipsometry measurements.
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2023/2/17
Y1 - 2023/2/17
N2 - Metamaterials and metasurfaces operating in the visible and near-infrared (NIR) offer a promising route towards next-generation photodetectors and devices for solar energy harvesting. While numerous metamaterials and metasurfaces using metals and semiconductors have been demonstrated, semimetals-based metasurfaces in the vis-NIR range are notably missing. This work experimentally demonstrates a broadband metasurface superabsorber based on large area, semimetallic, van der Waals platinum diselenide (PtSe2) thin films in agreement with electromagnetic simulations. The results show that PtSe2 is an ultrathin and scalable semimetal that concurrently possesses high index and high extinction across the vis-NIR range. Consequently, the thin-film PtSe2 on a reflector separated by a dielectric spacer can absorb >85% for the unpatterned case and ≈97% for the optimized 2D metasurface in the 400–900 nm range making it one of the strongest and thinnest broadband perfect absorbers to date. The results present a scalable approach to photodetection and solar energy harvesting, demonstrating the practical utility of high index, high extinction semimetals for nanoscale optics.
AB - Metamaterials and metasurfaces operating in the visible and near-infrared (NIR) offer a promising route towards next-generation photodetectors and devices for solar energy harvesting. While numerous metamaterials and metasurfaces using metals and semiconductors have been demonstrated, semimetals-based metasurfaces in the vis-NIR range are notably missing. This work experimentally demonstrates a broadband metasurface superabsorber based on large area, semimetallic, van der Waals platinum diselenide (PtSe2) thin films in agreement with electromagnetic simulations. The results show that PtSe2 is an ultrathin and scalable semimetal that concurrently possesses high index and high extinction across the vis-NIR range. Consequently, the thin-film PtSe2 on a reflector separated by a dielectric spacer can absorb >85% for the unpatterned case and ≈97% for the optimized 2D metasurface in the 400–900 nm range making it one of the strongest and thinnest broadband perfect absorbers to date. The results present a scalable approach to photodetection and solar energy harvesting, demonstrating the practical utility of high index, high extinction semimetals for nanoscale optics.
UR - http://www.scopus.com/inward/record.url?scp=85144021995&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85144021995&partnerID=8YFLogxK
U2 - 10.1002/adom.202202011
DO - 10.1002/adom.202202011
M3 - Article
AN - SCOPUS:85144021995
SN - 2195-1071
VL - 11
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 4
M1 - 2202011
ER -