sglux-logo
bag-icon
en

sglux

UV is our Business

Generic filters
Exact matches only

2025 – Flame monitoring in industrial burners with semiconductor-based UV sensors focusing on hydrogen-flame

von

Dr. Tilman Weiss, sglux GmbH, Berlin, Germany
Yuyu Kimura, IR System Co., Ltd., Tokyo, Japan

This article was first published in the Japanese Journal of Industrial Heating 2025, vol. 62, no. 3, Edition May
Flame monitoring in industrial burners with semiconductor-based UV sensors focusing on hydrogen-flame

Abstract
Using semiconductor based sensors for flame detection, such as presented with this article can be regarded as a fascinating approach not just with regards on costs and safety. Additionally, looking at environmental and sustainability aspects using semiconductor sensors instead of discharge tubes is a useful tool towards durability and longevity. The possibility of working with two different sensor chips for two different kind of irradiadion (UV and IR) in one small size sensor housing opens up a multitude of new and interesting application possibilities.

2024 Digital UV Sensors – The Smartphone becomes a Radiometer

von

Dr. Tilman Weiss, sglux GmbH, Berlin, Germany

Abstract

Sensor Magazin 4/2024 (c) Magazin Verlag

UV radiation is used in many areas of industrial production, in medical devices and for disinfection. Precise measurement of irradiance is important for the controlled and efficient use of UV radiation. The UV measuring devices used for these applications must be able to measure the UV irradiance reliably, reproducibly and traceably over 13 orders of magnitude, from a few pW/cm2 up to 10 W/cm2. This is where digital measuring probes show their strengths.

2024 – Measuring UV radiation without filters – silicon carbide (SiC) photodiodes make it possible

von

Dr. Niklas Papathanasiou, sglux GmbH, Berlin, Germany

Sensor Magazin 2/2024 (c) Magazin Verlag

Abstract
For more than 20 years, the Berlin-based company sglux GmbH has been producing photodiodes and sensors for measuring UV radiation, as used in many areas of industrial production, medical technology, combustion control and for monitoring UV disinfection processes. The precise detection of the ultraviolet irradiance is of great importance for a controlled and efficient functioning. sglux solves these tasks with SiC-based photodiodes, since 2009 from in-house semiconductor production. SiC photodiodes have an advantage in the detection of UV radiation due to their high band gap of 3.26 eV, as they are insensitive to visible and near-infrared radiation. In addition, SiC photodiodes have very low dark currents, so that even the smallest amounts of radiation can be detected. In the measurement of strong UV radiation, SiC scores with its high resistance to degradation.

2023 – 4H-SiC PIN Photodiode for VUV Detection Using an Enhanced Emitter Doping Design

von

M. Schraml¹, N. Papathanasiou², A. May¹, M. Rommel¹, T. Erlbacher³
¹Fraunhofer IISB, Erlangen, Germany
²sglux GmbH, Berlin, Germany
³Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

2023 IEEE Photonics Conference (IPC) 12. – 16.11.2023
4H-SiC PIN Photodiode for VUV Detection Using an Enhanced Emitter Doping Desig

Abstract
The fabrication of a novel Vacuum UV (VUV) sensitive 4H-SiC pin photodiode is presented. Aluminum ion implantation was used to fabricate a patterned emitter structure with p – and p + regions resulting in the highest reported VUV sensitivity for a SiC pin photodiode.

2023 – Towards Sic-Based VUV Pin-Photodiodes – Investigations on 4H-SiC Photodiodes with Shallow Implanted Al Emitters

von

Michael Schraml¹, Alexander May¹, Dr. Tobias Erlbacher¹, Dr. Niklas Papathanasiou², Dr. Tilman Weiss²,
¹Fraunhofer IISB, Erlangen, Germany
²sglux GmbH, Berlin, Germany

Towards SiC-Based VUV Pin-Photodiodes – Investigations on 4H-SiC Photodiodes with Shallow Implanted Al Emitters

Zusammenfassung
4H silicon carbide (SiC) based pin photodiodes with a sensitivity in the vacuum ultraviolet spectrum (VUV) demand newly developed emitter doping profiles. This work features the first ever reported 4H-SiC pin photodiodes with an implanted p-emitter and a noticeable sensitivity at a wavelength of 200 nm. As a first step, Aluminum doping profiles produced by low energy ion implantation in 4H-SiC were characterized by secondary-ion mass spectrometry (SIMS). Photodiodes using these shallow emitters are compared to one with a deep p-emitter doping profile employing IV characteristics and the spectral response. SIMS results demonstrate the possibility of shallow Alimplantation profiles using low implantation energies with all emitter profiles featuring characteristic I-V results. For some shallow doping profiles, a meassurable signal at the upper limit of the VUV spectrum could be demonstrated, paving the way towards 4H-SiC pin photodiodes with sensitivities for wavelengths below 200 nm.

2022 – Marker Substances in the Aroma of Truffles

von

Ruben Epping¹, Lilly Bliesener¹, Dr. Tilman Weiss², Matthias Koch¹, *
¹Division of Organic Trace Analysis and Food Analysis, Bundesanstalt für Materialforschung und -Prüfung, Berlin, Germany
²sglux GmbH, Berlin, Germany
*Authors to whom correspondence should be addressed.

Marker Substances in the Aroma of Truffles

Abstract
The aim of this study was to identify specific truffle marker substances within the truffle aroma. The aroma profile of different truffle species was analyzed using static headspace sampling with gas chromatography mass spectrometry analysis (SHS/GC-MS). Possible marker substances were identified, taking the additional literature into account. The selected marker substances were tested in an experiment with 19 truffle dogs. The hypothesis “If trained truffle dogs recognize the substances as supposed truffles in the context of an experiment, they can be regarded as specific” was made. As it would be nearly impossible to investigate every other possible emitter of the same compounds to determine their specificity, this hypothesis was a reasonable approximation. We were interested in the question of what it is the dogs actually search for on a chemical level and whether we can link their ability to find truffles to one or more specific marker substances. The results of the dog experiment are not as unambiguous as could have been expected based on the SHS/GC-MS measurements. Presumably, the truffle aroma is mainly characterized and perceived by dogs by dimethyl sulfide and dimethyl disulfide. However, as dogs are living beings and not analytical instruments, it seems unavoidable that one must live with some degree of uncertainty regarding these results.

2021 – How two sglux photodiodes contribute to the NASA 2021 Perseverance mission

von

Luther W. Beegle et al.
Space Sci Rev (2021) 217:58

Perseverance’s Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) Investigation

Abstract
The Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) is a robotic arm-mounted instrument on NASA’s Perseverance rover. SHERLOC has two primary boresights. The Spectroscopy boresight generates spatially resolved chemical maps using fluorescence and Raman spectroscopy coupled to microscopic images (10.1 μm/pixel). The second boresight is a Wide Angle Topographic Sensor for Operations and eNgineering (WATSON); a copy of the Mars Science Labora- tory (MSL) Mars Hand Lens Imager (MAHLI) that obtains color images from microscopic scales (∼13 μm/pixel) to infinity. SHERLOC Spectroscopy focuses a 40 μs pulsed deep UV neon-copper laser (248.6 nm), to a ∼100 μm spot on a target at a working distance of ∼48 mm. Fluorescence emissions from organics, and Raman scattered photons from organics and minerals, are spectrally resolved with a single diffractive grating spectrograph with a spectral range of 250 to ∼370 nm. Because the fluorescence and Raman regions are natu- rally separated with deep UV excitation (<250 nm), the Raman region ∼ 800 – 4000 cm−1 (250 to 273 nm) and the fluorescence region (274 to ∼370 nm) are acquired simultaneously without time gating or additional mechanisms. SHERLOC science begins by using an Aut- ofocus Context Imager (ACI) to obtain target focus and acquire 10.1 μm/pixel greyscale images. Chemical maps of organic and mineral signatures are acquired by the orchestration of an internal scanning mirror that moves the focused laser spot across discrete points on the target surface where spectra are captured on the spectrometer detector. ACI images and chemical maps (< 100 μm/mapping pixel) will enable the first Mars in situ view of the spa- tial distribution and interaction between organics, minerals, and chemicals important to the assessment of potential biogenicity (containing CHNOPS). Single robotic arm placement chemical maps can cover areas up to 7×7 mm in area and, with the < 10 min acquisition time per map, larger mosaics are possible with arm movements. This microscopic view of the organic geochemistry of a target at the Perseverance field site, when combined with the other instruments, such as Mastcam-Z, PIXL, and SuperCam, will enable unprecedented analysis of geological materials for both scientific research and determination of which sam- ples to collect and cache for Mars sample return.