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We present high-resolution, all-optical thermometry based on ensembles of GeV color center in diamond. Due to the unique properties of diamond, an all-optical approach using this method opens a way to produce non-invasive, back-action-free…

The development of sixth-generation (6G) wireless communication systems demands innovative solutions to address challenges in the deployment of a large number of base stations and the detection of multi-band signals. Quantum technology,…

Signal Processing · Electrical Eng. & Systems 2024-10-01 Qunsong Zeng , Jiahua Zhang , Madhav Gupta , Zhiqin Chu , Kaibin Huang

There is a great interest in the scientific community to perform calorimetry on samples having mass in the nanogram range. A detailed knowledge of the energy (heat) exchange in the fast growing family of micro- and nano-systems could…

Applied Physics · Physics 2021-12-02 S. Veronesi , T. Papa , Y. Murata , S. Heun

Quantum sensing with nitrogen-vacancy centers in diamond has emerged as a powerful tool for measuring diverse physical parameters, yet the versatility of these measurement approaches is often limited by the achievable layout and…

Temperature field contactless measurements in or at the surfaces of semitransparent media are a scientific challenge, as classical thermography techniques based on proper material emission cannot be used. In this work, an alternative method…

Extracellular vesicles (EVs) have drawn rapidly increasing attention as the next-generation diagnostic biomarkers and therapeutic agents. However, the heterogeneous nature of EVs necessitates advanced methods for profiling EVs at the…

Biomolecules · Quantitative Biology 2025-07-08 Yiting Liu , Anthony James El-helou , Bill Soderstrom , Juanfang Ruan , Ying Zhu

We recently (Optics Express 17, 19969 (2009)) introduced an all-optical method for grafting onto the apex of an optical tip a single 20 nm nanodiamond with single color-center occupancy and used the resulting single-photon tip in scanning…

Mesoscale and Nanoscale Physics · Physics 2010-03-11 A. Cuche , A. Drezet , J. -F. Roch , F. Treussart , S. Huant

Nitrogen-vacancy centers in diamond are attractive as quantum sensors owing to their remarkable optical and spin properties under ambient conditions. Here we experimentally demonstrated a hybrid fiber-based thermometer coupled with…

Instrumentation and Detectors · Physics 2019-07-29 Shao-Chun Zhang , Shen Li , Bo Du , Yang Dong , Yu Zheng , Hao-Bin Lin , Bo-Wen Zhao , Wei Zhu , Guan-Zhong Wang , Xiang-Dong Chen , Guang-Can Guo , Fang-Wen Sun

In this study, we developed a diamond quantum magnetometer based on Ramsey interferometry with a short sensor-to-sample distance. Conventional biomagnetic sensors with ensemble nitrogen-vacancy centers using continuous-wave optically…

Semiconductor membranes find their widespread use in various research fields targeting medical, biological, environmental, and optical applications. Often such membranes derive their functionality from an inherent nanopatterning, which…

Density functional theory (DFT) is an efficient instrument for describing a wide range of nanoscale phenomena: wetting transition, capillary condensation, adsorption, etc. In this paper, we suggest a method for obtaining the equilibrium…

Computational Physics · Physics 2021-06-18 Yuriy Kanygin , Irina Nesterova , Pavel Lomovitskiy , Aleksey Khlyupin

Owing to the unique electronic spin properties, the nitrogen-vacancy (NV) centers hosted in diamond have emerged as a powerful quantum sensor for various physical parameters and biological species. In this work, a miniature optical-fiber…

The diamond sensor has emerged as a promising platform for quantum sensing, enabling the estimation of physical quantities -- such as microwave~(MW) field -- with precision unattainable by classical counterpart. However, traditional diamond…

Quantum Physics · Physics 2025-10-07 Qi-Tao Duan , Teng Li , Si-Qi Chen , Shengshi Pang , He Lu

Naturally occurring paramagnetic species (PS), such as free radicals and paramagnetic metalloproteins, play an essential role in a multitude of critical physiological processes including metabolism, cell signaling and immune response. These…

Simulation of detecting photoelectrons using multi-level multi-electron (MLME) finite-difference time-domain (FDTD) method with an application to near-field subwavelength imaging based on semiconductor nanophotodetector (NPD) array is…

Optics · Physics 2009-02-20 Ki Young Kim , Boyang Liu , Yingyan Huang , Seng-Tiong Ho

The constant interplay and information exchange between cells and their micro-environment are essential to their survival and ability to execute biological functions. To date, a few leading technologies such as traction force microscopy,…

Cell Behavior · Quantitative Biology 2023-06-29 Feng Xu , Shuxiang Zhang , Linjie Ma , Yong Hou , Jie Li , Andrej Denisenko , Zifu Li , Joachim Spatz , Jörg Wrachtrup , Qiang Wei , Zhiqin Chu

A smartphone fluorimeter capable of time-based fluorescence intensity measurements at various temperatures is reported. Excitation is provided by an integrated UV LED (370 nm) and detection obtained using the in-built CMOS camera. A Peltier…

A novel microfabricated, all-electrical measurement platform is presented for a direct, accurate and rapid determination of the thermal conductivity and diffusivity of liquid and solid materials. The measurement approach is based on the…

We have developed a new micro-fabricated platform for the measurement of the specific heat of low heat capacity mg-sized metallic samples, such as superconductors, down to temperatures of as low as $10\,\mathrm{mK}$. It addresses…

Instrumentation and Detectors · Physics 2020-03-24 Andreas Reifenberger , Andreas Reiser , Sebastian Kempf , Andreas Fleischmann , Christian Enss

The transition of materials and devices to nanometer, atomic, and quantum scales makes thermal characterization increasingly challenging, driving the need for advanced nanoscale thermometry. Fluorescence nanothermometry has emerged as a…