Interference Filters for the Far Ultraviolet (1700 Å to 2400 Å)

Bates, B.; Bradley, Daniel

doi:10.1364/ao.5.000971

Cited by 46 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Metal dielectric filters (MDF), also known as FabryPerot filters or photonic bandgaps have a long history of use as bandpass filters in the UV. 33 In these structures matched parallel reflecting plates are separated by a transparent spacer layer in order to destructively phase-match the reflection off of one metal layer at a particular wavelength and therefore maximize transmission through the structure. Out of band …”

Section: Solar Blind Coatingsmentioning

confidence: 99%

Superlattice-doped silicon detectors: progress and prospects

et al. 2014

View full text Add to dashboard Cite

In this paper we review the physics and performance of silicon detectors passivated with wafer-scale molecular beam epitaxy (MBE) and atomic layer deposition (ALD). MBE growth of a two-dimensional (2D) doping superlattice on backside-illuminated (BSI) detectors provides nearly perfect protection from interface traps, even at trap densities in excess of 10 14 cm -2 . Superlattice-doped, BSI CMOS imaging detectors show no measurable degradation of quantum efficiency or dark current from long-term exposure to pulsed DUV lasers. Wafer-scale superlattice-doping has been used to passivate CMOS and CCD imaging arrays, fully-depleted CCDs and photodiodes, and large-area avalanche photodiodes. Superlattice-doped CCDs with ALD-grown antireflection coatings achieved world record quantum efficiency at deep and far ultraviolet wavelengths (100-300nm). Recently we have demonstrated solar-blind, superlattice doped avalanche photodiodes using integrated metal-dielectric coatings to achieve selective detection of ultraviolet light in the 200-250 nm spectral range with high out-of-band rejection.

show abstract

Section: Solar Blind Coatingsmentioning

confidence: 99%

Superlattice-doped silicon detectors: progress and prospects

et al. 2014

View full text Add to dashboard Cite

show abstract

“…[ 23 , 24 ] Effi cient refl ectors for far UV (170-240 nm) have already been realized by single and multiple Fabry-Perot interference fi lters based on a combination of metal layers, typically aluminium, and dielectrics. [25][26][27] Polymeric stacks made by dip-or spin-coating are also used to block…”

Section: Introductionmentioning

confidence: 99%

Selective UV Reflecting Mirrors Based on Nanoparticle Multilayers

Smirnov

Calvo

Míguez

2013

Adv Funct Materials

View full text Add to dashboard Cite

A new type of nanostructured selective ultraviolet (UV) reflecting mirror is presented. Periodic porous multilayers with photonic crystal properties are built by spin‐coating‐assisted layer‐by‐layer deposition of colloidal suspensions of nanoparticles of ZrO2 and SiO2 (electronic band gap at λ < 220 nm). These optical filters are designed to block well‐defined wavelength ranges of the UVA, UVB, and UVC regions of the electromagnetic spectrum while preserving transparency in the visible. The shielding against those spectral regions arises exclusively from optical interference phenomena and depends only on the number of stacked layers and the refractive index contrast between them. In addition, it is shown that the accessible pore network of the as‐deposited multilayer allows preparing thin, flexible, self‐standing, transferable, and adaptable selective UV filters by polymer infiltration, without significantly losing reflectance intensity, i.e., preserving the dielectric contrast. These films offer a degree of protection comparable to that of traditional ones, without any foreseeable unwanted secondary effects, such as photodegradation, increase of local temperature or, as is the case for organic absorbers, generation of free radicals, all of which are caused by light absorption.

show abstract

“…Most often used filters are transmission filters through a multilayer based on Al and MgF 2 that is deposited on an FUV-transparent fluoride substrate (Baumeister 1965, Bates and Bradley 1966, Malherbe and Guillard 1970, Fairchild 1973, Malherbe 1974. These filters are based on the transparency of MgF 2 down to its cutoff wavelength (115 nm), on the high refractive index contrast of MgF 2 with Al, and on the absorption of Al, which increases with wavelength.…”

Section: Coatings For Issis Wso and For Future Applicationsmentioning

confidence: 99%

GOLD’s coating and testing facilities for ISSIS-WSO

Larruquert¹,

Méndez²,

Aznárez³

et al. 2011

Astrophys Space Sci

View full text Add to dashboard Cite

ISSIS imager has been thought as an open purpose instrument within the World Space Observatory (WSO) international space mission. The highest priorities of IS-SIS, an instrument to be developed by Spain, are to guarantee high spatial resolution and high sensitivity down to the far ultraviolet (FUV). The paper displays the capacities of GOLD for multilayer deposition and FUV reflectometry, among other metrologies, for ISSIS optical elements.Deposition of coatings for ISSIS-WSO will be carried out in a new UHV system with a 75-cm diameter deposition chamber. The purpose of the new laboratory is the deposition of coatings satisfying the constraints for FUV space optics. The first target coating to be developed in this new laboratory is Al protected with MgF 2 , with optimum reflectance down to ∼120 nm.GOLD's existing reflectometer is able to characterize flat pieces both by transmittance and reflectance, and the latter from near-normal to grazing incidence, in the range from 12 to 200 nm. Other metrologies that will be available at GOLD for ISSIS's coatings and filters include optical thickness of filters to assure parfocality, filter wedge, and coating and filter scattering.

show abstract

Interference Filters for the Far Ultraviolet (1700 Å to 2400 Å)

Cited by 46 publications

References 11 publications

Superlattice-doped silicon detectors: progress and prospects

Superlattice-doped silicon detectors: progress and prospects

Selective UV Reflecting Mirrors Based on Nanoparticle Multilayers

GOLD’s coating and testing facilities for ISSIS-WSO

Contact Info

Product

Resources

About