Investigations of whisper gallery mirrors for extreme ultraviolet (EUV) and soft X-rays

The authors have examined optical constants and predicted reflectivities of candidate surface coatings for whisper gallery mirrors (WGMs) in the extreme ultraviolet. The spectral regime near 100-150 AA has been identified in the literature as particularly promising due to the high WGM reflectivities...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1992-05, Vol.28 (5), p.1376-1383
Main Authors: Hung, T.-Y., Hagelstein, P.L.
Format: Article
Language:English
Subjects:
426002 - Engineering- Lasers & Masers- (1990-)
Applied sciences
Circuit properties
COATINGS
Electric, optical and optoelectronic circuits
ELECTROMAGNETIC RADIATION
Electronics
ELEMENTS
ENGINEERING
Exact sciences and technology
FLUIDS
GASES
Integrated optics. Optical fibers and wave guides
IONIZING RADIATIONS
LASER CAVITIES
LASER MIRRORS
METALS
MIRRORS
NONMETALS
Optical and optoelectronic circuits
Optical materials
OPTICAL PROPERTIES
Optical reflection
Optical surface waves
PHYSICAL PROPERTIES
RADIATIONS
RARE GASES
REFLECTIVE COATINGS
REFLECTIVITY
SOFT X RADIATION
Surface contamination
SURFACE PROPERTIES
Surface waves
Tellurium
Ultraviolet sources
X RADIATION
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Summary:The authors have examined optical constants and predicted reflectivities of candidate surface coatings for whisper gallery mirrors (WGMs) in the extreme ultraviolet. The spectral regime near 100-150 AA has been identified in the literature as particularly promising due to the high WGM reflectivities of the noble metals in the vicinity of their Cooper minima in this regime. The authors confirm this basic result using newer EUV optical data, and they have sought candidate surface materials which would extend the range over which WGMs may be used to longer wavelengths. It is found that substantial WGM reflectivities are predicted for a variety of elements in the EUV, and that TE peak reflection is larger than TM peak reflection by on the order of 10%; however, most of the elements which do reflect well have surfaces which are vulnerable to oxygen contamination.< >
ISSN:0018-9197
1558-1713
DOI:10.1109/3.135280