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Retrieval of the complex-valued refractive index of germanium near the M_(4,5) absorption edge

Kaplan, Christopher J. and Kraus, Peter M. and Gullikson, Eric M. and Borja, L. J. and Cushing, Scott K. and Zürch, Michael and Chang, Hung-Tzu and Neumark, Daniel M. and Leone, Stephen R. (2019) Retrieval of the complex-valued refractive index of germanium near the M_(4,5) absorption edge. Journal of the Optical Society of America B, 36 (6). pp. 1716-1720. ISSN 0740-3224. https://resolver.caltech.edu/CaltechAUTHORS:20190620-093004766

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Abstract

The complex-valued index of refraction of germanium in the extreme ultraviolet (XUV) is measured by multi-angle reflectance of synchrotron radiation. The resulting index of refraction is higher resolution than previously measured values. It reveals new structures attributed to transitions from the 3d-core orbitals to the Σ^_(5,2) and the X^c_(5,2) conduction bands. Additionally, it is shown that the problem of total external reflection, which renders multi-angle reflectance measurements insensitive to the complex-valued refractive index at grazing incidence, can be overcome by employing measurements at angles of incidence away from the critical angle.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1364/josab.36.001716DOIArticle
ORCID:
AuthorORCID
Kaplan, Christopher J.0000-0002-5873-9487
Cushing, Scott K.0000-0003-3538-2259
Chang, Hung-Tzu0000-0001-7378-8212
Neumark, Daniel M.0000-0002-3762-9473
Leone, Stephen R.0000-0003-1819-1338
Alternate Title:Retrieval of the complex-valued refractive index of germanium near the M4,5 absorption edge
Additional Information:© 2019 Optical Society of America. Received 22 March 2019; revised 23 April 2019; accepted 24 April 2019; posted 25 April 2019 (Doc. ID 362900); published 31 May 2019. Funding: Army Research Office (ARO) (WN911NF14-1-0383); Swiss National Science Foundation (SNF) (P2EZP2_165252, P300P2_174293); Office of Energy Efficiency and Renewable Energy (EERE); Air Force Office of Scientific Research (AFOSR) (FA9550-15-1-0037); W. M. Keck Foundation; Office of Assistant Secretary of Defense for Research and Engineering; Defense Sciences Office, DARPA (DSO, DARPA) (W31P4Q-13-1-0017).
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)WN911NF14-1-0383
Swiss National Science Foundation (SNSF)P2EZP2_165252
Swiss National Science Foundation (SNSF)P300P2_174293
Department of Energy (DOE)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)FA9550-15-1-0037
W. M. Keck FoundationUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)W31P4Q-13-1-0017
Issue or Number:6
Record Number:CaltechAUTHORS:20190620-093004766
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190620-093004766
Official Citation:Christopher J. Kaplan, Peter M. Kraus, Eric M. Gullikson, L. J. Borja, Scott K. Cushing, Michael Zürch, Hung-Tzu Chang, Daniel M. Neumark, and Stephen R. Leone, "Retrieval of the complex-valued refractive index of germanium near the M4,5 absorption edge," J. Opt. Soc. Am. B 36, 1716-1720 (2019)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96594
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:20 Jun 2019 20:14
Last Modified:03 Oct 2019 21:23

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