The effects of fiber coupling and fiber length on photocurrent fluctuations are studied when the light of a laser diode transmitted to and from a dynamic turbid medium by a step-index multimode fiber is studied. When the laser light is coupled asymmetrically, filling only the higher-order modes, the photocurrent fluctuations are suppressed significantly when fiber lengths of as much as 16 m are added between the laser and the medium. Addition of as much as 16 m of detection fiber, or any fiber in the case of symmetric light coupling, leads to much less or no suppression of the photocurrent fluctuations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ao.43.002059 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Combination of exciton-plasmon interaction and programmable DNA cyclic amplification for electrochemiluminescence/photoelectrochemical sensing of serotonin.
Talanta
December 2024
School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China.
A novel dual-mode electrochemiluminescence (ECL)/photoelectrochemistry (PEC) biosensor was developed for sensitive serotonin detection. In this system, the PEC signal was produced by CdS quantum dots (QDs), while the ECL signal originated from L-Au NPs (luminol decorated Au nanoparticles), thereby avoiding the external interference and signal fluctuations that typically arose from using the same materials for both signals. The presence of target serotonin initiated the non-enzymatic toehold-mediated strand displacement reaction (TSDR) on magnetic bead (MB), which was followed by catalytic hairpin assembly (CHA) on the sensing interface, leading to the aggregation of many L-Au NPs.
View Article and Find Full Text PDFMagnetospectroscopy of shallow donors in two dimensions in the presence of fluctuations of the electrostatic potential.
Nanophotonics
April 2024
Faculty of Physics, University of Warsaw, ul. L. Pasteura 5, 02-093 Warsaw, Poland.
Article Synopsis
- The study investigates the spectroscopy of shallow donors in a CdTe/(Cd, Mg)Te structure, which helps test theoretical semiconductor models.
- Measurements were taken at low temperatures (4.2 K) and under strong magnetic fields, focusing on the photocurrent generated by far-infrared photons.
- The observed spectra show unexpected behaviors that don’t match traditional theories, leading to a new model that combines electrostatic fluctuations and magnetic field effects on electron localization.
Enhanced photoelectric desalination of CoO@NC/BiVO photoanode via in-situ construction of hole transport layer.
J Colloid Interface Sci
February 2025
State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, Ningxia 750021, PR China. Electronic address:
The solar-driven photoelectrochemical desalination (SD-PED) technology, as a new emerging desalination technique, has been developed and attracted the increasing attention. However, practical application remains hampered by several constraints, including the rapid deterioration of photocurrent, and the long-term stability of system. In this research, MOF-derived nitrogen-doped carbon@CoO/BVO (CoO@NC/BVO) heterostructured photoanode was design for efficient and durable solar driven redox desalination.
View Article and Find Full Text PDFSpin-Enhanced Self-Powered Light Helicity Detecting Based on Vertical WSe-CrI Heterojunction.
ACS Nano
September 2024
State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China.
Two-dimensional (2D) magnetic semiconductors offer an intriguing platform for investigating magneto-optoelectronic properties and hold immense potential in developing prospective devices when they are combined with valley electronic materials like 2D transition-metal dichalcogenides. Herein, we report various magneto-optoelectronic response features of the vertical hBN-FLG-CrI-WSe-FLG-hBN van der Waals heterostructure. Through a sensible layout and exquisite manipulation, an hBN-FLG-CrI-FLG-hBN heterostructure was also fabricated on identical CrI and FLGs for better comparison.
View Article and Find Full Text PDFSpatial-resolved and self-calibrated 3D-printed photoelectrochemical biosensor engineered by multifunctional CeO/CdS heterostructure for immunoassay.
Biosens Bioelectron
October 2024
College of Chemistry and Chemical Engineering, Key Laboratory of Shandong Provincial Universities for Functional Molecules and Materials, Qingdao University, Qingdao, 266000, PR China. Electronic address:
A spatial-resolved and self-calibrated photoelectrochemical (PEC) biosensor has been fabricated by a multifunctional CeO/CdS heterostructure, achieving portable and sensitive detection of carcinoembryonic antigen (CEA) using a homemade 3D printing device. The CeO/CdS heterostructure with matched band structure is prepared to construct the dual-photoelectrodes to improve the PEC response of CeO. In particular, as the photoactive nanomaterial, the CeO also plays the role of peroxidase mimetic nanozymes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!