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1440 nm

Pawel E Malinowski, Epimitheas Georgitzikis, Jorick Maes, Ioanna Vamvaka, Fortunato Frazzica, Jan Van Olmen, Piet De Moor, Paul Heremans, Zeger Hens, David Cheyns
Imaging in the infrared wavelength range has been fundamental in scientific, military and surveillance applications. Currently, it is a crucial enabler of new industries such as autonomous mobility (for obstacle detection), augmented reality (for eye tracking) and biometrics. Ubiquitous deployment of infrared cameras (on a scale similar to visible cameras) is however prevented by high manufacturing cost and low resolution related to the need of using image sensors based on flip-chip hybridization. One way to enable monolithic integration is by replacing expensive, small-scale III-V-based detector chips with narrow bandgap thin-films compatible with 8- and 12-inch full-wafer processing...
December 10, 2017: Sensors
Thomas Werblinski, Peter Fendt, Lars Zigan, Stefan Will
The first results under fired internal combustion engine conditions based on a supercontinuum absorption spectrometer are presented and discussed. Temperature, pressure, and water mole fraction are inferred simultaneously from broadband H2 O absorbance spectra ranging from 1340 nm to 1440 nm. The auto-ignition combustion process is monitored for two premixed n-heptane/air mixtures with 10 kHz in a rapid compression machine. Pressure and temperature levels during combustion exceed 65 bar and 1900 K, respectively...
May 20, 2017: Applied Optics
Christopher T Chia, Mark G Albert, Sharon Del Vecchio, Spero J Theodorou
BACKGROUND: Liposuction remains one of the most popular aesthetic surgery procedures performed today, and it has undergone continuous refinements over the past four decades. Advancements in anesthesia, improvements in instrumentation, better understanding of fluid dynamics and the addition of energy to liposuction have led to better outcomes with improved safety and efficacy. OBJECTIVES: The purpose of this study is to review 1000 consecutive laser-assisted liposuction (LAL) cases utilizing the 1440 nm wavelength...
September 15, 2017: Aesthetic Plastic Surgery
Zejie Yu, Haoran Cui, Xiankai Sun
Polarization control of light waves is an important technique in optical communication and signal processing. On-chip polarization rotation from the fundamental transverse-electric (TE00 ) mode to the fundamental transverse-magnetic (TM00 ) mode is usually difficult because of their large effective refractive index difference. Here, we demonstrate an on-chip wideband polarization rotator designed with a genetic algorithm to convert the TE00 mode into the TM00 mode within a footprint of 0.96 μm ×4.2  μm...
August 15, 2017: Optics Letters
Chad M Parish, Takaaki Koyanagi, Sosuke Kondo, Yutai Katoh
We observed that β-SiC, neutron irradiated to 9 dpa (displacements per atom) at ≈1440 °C, began transforming to α-SiC, with radiation-induced Frank dislocation loops serving as the apparent nucleation sites. 1440 °C is a far lower temperature than usual β → α phase transformations in SiC. SiC is considered for applications in advanced nuclear systems, as well as for electronic or spintronic applications requiring ion irradiation processing. β-SiC, preferred for nuclear applications, is metastable and undergoes a phase transformation at high temperatures (typically 2000 °C and above)...
April 26, 2017: Scientific Reports
Alan Wing Lun Law, Rafay Ahmed, Tsz Wing Cheung, Chun Yu Mak, Condon Lau
We report a novel Raman spectroscopy method for in situ cellular level analysis of the thyroid. Thyroids are harvested from control and lithium treated mice. Lithium is used to treat bipolar disorder, but affects thyroid function. Raman spectra are acquired with a confocal setup (514 nm laser, 20 µm spot) focused on a follicular lumen. Raman peaks are observed at 1440, 1656, and 1746 cm(-1), corresponding to tyrosine, an important amino acid for protein synthesis. Peaks are also observed at 563, 1087, 1265 and 1301 cm(-1)...
February 1, 2017: Biomedical Optics Express
Barry E DiBernardo, Gordon H Sasaki, Bruce E Katz, Joseph P Hunstad, Christine Petti, A Jay Burns
BACKGROUND: Treatment of cellulite using a 1440-nm YAG wavelength laser with side-firing fiber has proven safe and effective, lasting at least 6 months. OBJECTIVES: The authors evaluate the safety and efficacy of a single, subdermal procedure to treat the underlying structure of cellulite for at least 1 year. METHODS: Fifty-seven patients underwent a 3-step cellulite treatment with a 1440-nm Nd:YAG laser with a side-firing fiber and temperature-sensing cannula...
March 2016: Aesthetic Surgery Journal
PhaniKiran Vabbina, Nitin Choudhary, Al-Amin Chowdhury, Raju Sinha, Mustafa Karabiyik, Santanu Das, Wonbong Choi, Nezih Pala
Two dimensional (2D) Molybdenum disulfide (MoS2) has evolved as a promising material for next generation optoelectronic devices owing to its unique electrical and optical properties, such as band gap modulation, high optical absorption, and increased luminescence quantum yield. The 2D MoS2 photodetectors reported in the literature have presented low responsivity compared to silicon based photodetectors. In this study, we assembled atomically thin p-type MoS2 with graphene to form a MoS2/graphene Schottky photodetector where photo generated holes travel from graphene to MoS2 over the Schottky barrier under illumination...
July 22, 2015: ACS Applied Materials & Interfaces
Stefanie Luebberding, Nils Krueger, Neil S Sadick
BACKGROUND: Cellulite is a multifactorial condition that is present in 80-90 % of post-pubertal women. Despite its high prevalence, it remains a major cosmetic concern for women. A wide range of products and treatments for cellulite reduction is available; however, no systematic review has been performed so far to evaluate the efficacy of the available treatment options for cellulite. OBJECTIVE: The objective of this review is to provide a systematic evaluation of the scientific evidence of the efficacy of treatments for cellulite reduction...
August 2015: American Journal of Clinical Dermatology
Tanzina Khaleque, Mohammad Jalal Uddin, Robert Magnusson
We present the design and fabrication of guided-mode resonant broadband reflectors operating in transverse electric (TE) polarization. The structure consists of a subwavelength one-dimensional grating with a two-part period and a nanometric homogeneous layer of amorphous silicon on a quartz substrate. A representative reflector exhibits 99% reflectance over a 380-nm spectral range spanning 1440-1820 nm. The fabrication involves thin-film deposition, interferometric lithography, and reactive ion etching. Experimental reflectance greater than 90% is achieved over a ~360-nm bandwidth...
May 19, 2014: Optics Express
David Caplin, Jordan Austin
BACKGROUND: Primary Focal Axillary Hyperhidrosis (PHH) is a chronic disorder of excessive underarm sweat that causes significant impairment of an individual's daily activities. Multiple studies have established the psychosocial burden of PHH and its negative impact on quality of life. Current first-line therapies include the use of topical aluminum chloride with limited efficacy. Second line therapy includes the use of Botulinum toxin, which is effective, but duration is limited to 6-7 months...
April 2014: Journal of Drugs in Dermatology: JDD
Shuhei Kawamura, Yuka Unno, Takatsugu Hirokawa, Akira Asai, Mitsuhiro Arisawa, Satoshi Shuto
Rational scaffold hopping of a natural product belactosin A derivative was successfully achieved based on the pharmacophore model constructed. The peptidic scaffold was replaced by significantly simplified non-peptidic scaffolds, by which weak belactosin A (IC50 = 1440 nM) was converted into highly potent non-peptidic inhibitors (IC50 = 26-393 nM).
March 7, 2014: Chemical Communications: Chem Comm
Deshraj Jain, Prabha Shakya
BACKGROUND: Denture-related stomatitis is probably the most common form of oral candidiasis and its reported prevalence varies widely ranging up to 65%. In this thorough study, we evaluate the effect of Delmopinol application on Candida albicans adherence on heat cured denture base acrylic resin. MATERIALS AND METHODS: A total of 40 specimens of heat-cured acrylic resin were made, 20 specimens were contaminated before Delmopinol treatment and 20 specimens were contaminated after Delmopinol treatment...
September 2013: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Yeon-Jee Yoo, Won-Jun Shon, Seung-Ho Baek, Mo K Kang, Hyeon-Cheol Kim, WooCheol Lee
INTRODUCTION: The purpose of this study was to investigate the efficacy of a 1440-nm neodymium:yttrium-aluminum-garnet (Nd:YAG) laser on relieving pain in relation to the levels of inflammatory cytokine and neuropeptides in the root canal exudates of teeth with persistent symptomatic apical periodontitis. METHODS: Forty teeth with persistent symptomatic apical periodontitis were randomly assigned to treatment groups: group L, intracanal irradiation of 1440-nm Nd:YAG laser with a 300-μm-diameter fiberoptic tip in addition to conventional root canal retreatment, and group C, conventional root canal re-treatment...
January 2014: Journal of Endodontics
Bruce Katz
BACKGROUND: Cellulite gives the skin surface an orange peel or mattress-like appearance thought to be caused by expansion of subcutaneous fat, fibrotic septae and, dermal laxity and atrophy. OBJECTIVE: To evaluate the safety and efficacy of a single cellulite treatment using an Nd:YAG 1440-nm laser delivered with a special fiber delivery system and temperature control. METHODS: Women with cellulite on their thighs and buttocks were enrolled in a prospective Institutional Review Board-approved study...
November 2013: Journal of Drugs in Dermatology: JDD
Yves T Wang, Shi Gu, Andrew M Rollins, Michael W Jenkins
Conduction maps of early embryonic hearts with optical mapping point to heterogeneous conduction patterns that quickly evolve over time. In adult hearts, electrical pacing is utilized to determine the anisotropy of the conduction patterns and the susceptibility of the tissue to arrhythmias. However, studying electrophysiology in developing hearts is limited due to their size. Electrical pacing creates an electrical artifact that obscures recordings from the entirety of early embryonic hearts. In this study, optical point stimulation using a 1440-nm near-infrared diode laser with a 12-µm diameter beam waist was used to pace embryonic quail hearts...
2013: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Julie E Nkanta, Ramón Maldonado-Basilio, Kaiser Khan, Abdessamad Benhsaien, Sawsan Abdul-Majid, Jessica Zhang, Trevor J Hall
A broadband and low-polarization-sensitive multi-quantum well semiconductor optical amplifier with an asymmetric structure is reported for operation in the E-band wavelength range. A gain peak of 20 dB for a bandwidth of more than 50 nm is measured for both TE and TM polarizations. A maximum polarization sensitivity of 3 dB is measured for a broad wavelength range from 1340 to 1440 nm.
August 15, 2013: Optics Letters
Barry DiBernardo, Gordon Sasaki, Bruce E Katz, Joseph P Hunstad, Christine Petti, A Jay Burns
BACKGROUND: Historically, treatments for cellulite have not been able to address all of its physiological components and require multiple sessions. OBJECTIVE: The authors evaluate the safety and efficacy of a single, subdermal procedure to treat the underlying structure of cellulite. METHODS: Fifty-seven patients underwent a 3-step cellulite treatment with a 1440-nm Nd:YAG laser with a side-firing fiber and temperature-sensing cannula. Efficacy was measured by the ability of blinded evaluators to distinguish baseline photos from those taken at 3 and 6 months posttreatment, as well as their rating of the results on a 5-point, 2-category ordinal photonumeric scale when comparing baseline photos to those taken at 2, 3, and 6 months posttreatment...
May 2013: Aesthetic Surgery Journal
Barry E Dibernardo
BACKGROUND: The neck is a prominent indicator of aging. Loss of subcutaneous fat, prominence of platysmal banding, jowling along the mandibular border, and excessive skin laxity due to loss of collagen and elastin are common conditions that are treated. Laser technology provides additional benefits when treating the first two anatomical layers of the neck. METHODS: A 7-category classification system of anatomic skin layers of the lower face was developed. Based on the classifications treatments include the use of laser, ultrasonic technology, and toxins...
April 2013: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
S D Emami, H A A Rashid, A Zarifi, A Zarei, M R K Soltanian, S Z M Yasin, H Ahmad, S W Harun
A new approach for filtering an optical band-pass in optical amplifier is proposed using a macro bending. The proposed filter leverages the bending loss of higher order modes at shorter wavelengths. At longer wavelengths, the filter increases fiber's bending loss as the fundamental mode 'tail' is leak out from the cladding. The combination of wavelength dependent loss at longer and shorter wavelength gives rise to the optical band-pass filter characteristic inside the fiber. The simulated spectral response of the filter is found to be in good agreement with the experimental results...
December 31, 2012: Optics Express
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