Article
Chemistry, Analytical
Ulrike Blumroeder, Paul Koechert, Thomas Froehlich, Thomas Kissinger, Ingo Ortlepp, Jens Fluegge, Harald Bosse, Eberhard Manske
Summary: Since 2000, there has been an increasing interest in using optical frequency combs for industrial metrology applications. The use of GPS-referenced frequency combs as a self-calibrating length standard has become common, with uncertainties better than u = 1 x 10(-11). This article discusses the application of a He-Ne laser source disciplined to a GPS-referenced comb for interferometric measurements, effectively reducing length measurement errors and establishing a link to an atomic clock.
Article
Biochemical Research Methods
Jae-Hun Lee, Nathaniel T. Carpena, Sehwan Kim, Min Young Lee, Jae Yun Jung, Ji Eun Choi
Summary: The study found that 633-nm PBM can promote nerve regeneration and improve functional recovery in an injured facial nerve, while 804-nm light irradiation had poor outcomes.
JOURNAL OF BIOPHOTONICS
(2021)
Article
Biochemistry & Molecular Biology
Leon Kaub, Christoph Schmitz
Summary: The choice of laser beam parameters in the treatment of musculoskeletal diseases is important for achieving high penetration depths and molecular effects. This study compared the penetration depth of 1064 nm and 905 nm laser light using advanced measurement technology. The transmittance of 1064 nm light was consistently higher in both porcine skin and bovine muscle tissues. The largest differences were found in the upper 10 mm of tissue, while differences diminished with increasing tissue thickness. Overall, the differences in penetration depth were relatively small. These findings have implications for wavelength selection in laser therapy for musculoskeletal diseases.
Article
Optics
Youssef El Hajji, El Houssaine El Rhaleb
Summary: This study investigates the effect of melanin on light propagation inside different types of tissue. Phantoms approximating real tissue and mimicking its reaction to light were constructed. A Monte Carlo simulation was developed to study the intensity distribution of a light beam inside tissues. The study includes different Fitzpatrick skin types and provides intensity distribution and penetration depth in the 200-1000 nm wavelength range.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2023)
Article
Physics, Multidisciplinary
Fabian Meylahn, Benno Willke, Henning Vahlbruch
Summary: This study presents the first direct measurement of strongly squeezed vacuum states of light at a wavelength of 1550 nm for ground-based gravitational wave detectors. The results show squeezing up to 11.5 dB and quantum shot-noise reduction up to (13.5 +/- 0.1) dB at megahertz frequencies.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Maximilian R. J. Marek, Trong-Nhan Pham, Jianxin Wang, Qiuqi Cai, Glenn P. A. Yap, Emily S. Day, Joel Rosenthal
Summary: Photothermal therapy is a promising treatment option for various diseases. Researchers have developed new nanomaterials that can efficiently convert light into heat in the 850-1000 nm wavelength range, allowing for effective photothermal therapy. These materials provide a new platform for activating photothermal therapy.
Letter
Dermatology
Anna Takeuchi, Takeshi Fukumoto, Chikako Nishigori
Summary: Photo urticaria (PU) is a rare type of urticaria triggered by exposure to different wavelengths of light. A case of PU caused by 633 nm wavelength within the visible light spectrum is presented, possibly related to the LED light source in the patient's work environment.
PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE
(2022)
Article
Biochemical Research Methods
Nafiseh Yavari, Vahid H. Gazestani, Bo-Sen Wu, Sarah MacPherson, Ajjamada Kushalappa, Mark G. Lefsrud
Summary: This study investigates the proteomic responses of Arabidopsis thaliana to narrow wavelength blue, amber, and red light treatments using tandem mass tag based quantitative proteomics technology. The results reveal that 18% of the proteome of Arabidopsis thaliana shows differential abundance in response to narrow wavelength lights, and these proteomic changes are strongly correlated with morphological changes in plants.
JOURNAL OF PROTEOMICS
(2022)
Article
Nanoscience & Nanotechnology
Tianyang Zhang, Xiao Wang, Hui Huang, Yang Liu, Zhenhui Kang
Summary: Ultraviolet (UV) light-emitting diodes (LEDs) have wide applications in various fields, and carbon dots (CDs) are promising materials for the next generation of LEDs. Researchers have successfully prepared UV emission CDs and applied them in CD-LEDs, achieving the currently shortest electroluminescent emission wavelength of 386 nm. This work opens up a new pathway for manufacturing carbon nanomaterial-based UV emission devices with high luminance, external quantum efficiency (EQE), and stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Shijie Huang, Haokuan Qin, Muqing Liu
Summary: The study compared the photoinactivation effect of continuous wave (CW) and pulsed blue light, and found that pulsed 405 nm light had a better antimicrobial effect on E. coli, causing increasing damage of cell membrane, possibly due to ROS production in bacteria.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2023)
Article
Surgery
Faya Liang, Peiliang Lin, Ping Han, Xijun Lin, Renhui Chen, Jingyi Wang, Lanlan Deng, Xin Zou, Tan Cheng, Xiaoming Huang
Summary: This study retrospectively analyzed the clinical data of 130 patients undergoing thyroid surgery and compared the application value of 980-nm/1470-nm dual-wavelength fiber laser and ultrasonic scalpel. The results showed that both groups achieved successful operations, with slightly longer operative time and lower incidence of parathyroid gland congestion in the laser group. However, there were no significant differences in other indicators between the two groups. The dual-wavelength fiber laser had similar efficacy to the harmonic scalpel in thyroidectomy and had the advantages of safety and feasibility.
PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY
(2023)
Article
Multidisciplinary Sciences
Pranav Lanka, Leonardo Bianchi, Andrea Farina, Martina De Landro, Antonio Pifferi, Paola Saccomandi
Summary: This study reports the optical properties of porcine pancreatic tissue and provides important information for planning light-based thermotherapies and instruction of light transport models for biophotonic applications involving this organ. Good repeatability under different experimental conditions was obtained, but freezing-thawing the samples caused a reduction in the scattering coefficient. The calculated effective transport coefficient showed that certain wavelength ranges offer the lowest tissue attenuation.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Yi Chao Chow, Tanay Tak, Feng Wu, Jacob Ewing, Shuji Nakamura, Steven P. Denbaars, Yuh-Renn Wu, Claude Weisbuch, James S. Speck
Summary: We investigate the unexpected high-energy electroluminescence (EL) peaks observed in long-wavelength InGaN light-emitting diodes (LEDs) and identify two high-energy emission peaks. These peaks are attributed to transitions involving excited states and V-defect sidewalls, and their origins and influencing factors are examined.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Wansheng Liu, Suinan Deng, Lianjie Zhang, Cheng-Wei Ju, Yuan Xie, Wanyuan Deng, Junwu Chen, Hongbin Wu, Yong Cao
Summary: Short-wavelength infrared (SWIR) organic light-emitting diodes (OLEDs) are highly sought after for various applications, including biological imaging, infrared lighting, optical communication, environmental monitoring, and surveillance. This study introduces novel A-D-A'-D-A type small molecules NTQ and BTQ for high-performance SWIR OLEDs, which exhibit narrow optical gaps and achieve SWIR electroluminescence (EL) emission with high radiant exitance. The NTQ-based OLEDs also demonstrate a sub-gap turn-on voltage close to the physical limits, showcasing their potential for NIR/SWIR emitting material innovations.
ADVANCED MATERIALS
(2023)
Article
Medicine, General & Internal
Shima Fukuoka, Reiko Arita
Summary: This study compared the efficacy of the new AQUA CEL device and the traditional M22 device in treating meibomian gland dysfunction (MGD) with Intense Pulsed Light (IPL) therapy. The results showed that IPL therapy with both devices significantly improved symptoms and eye parameters in patients with MGD, and there were no significant differences in efficacy between the two devices.
JOURNAL OF CLINICAL MEDICINE
(2022)