http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김태훈,조상욱,박찬식,이학근,김두인,정명영,Kim, Taehoon,Cho, Sang Uk,Park, Chan Sik,Lee, Hak-Guen,Kim, Doo-In,Jeong, Myung Yung 한국마이크로전자및패키징학회 2016 마이크로전자 및 패키징학회지 Vol.23 No.3
본 논문에서는 긴 작동거리(working distance, WD)를 가지는 근적외선 형광 이미징 시스템을 소개하고, gain, 노출시간, 작동거리, 확대배율 등 측정 변수에 의한 형광 영상의 차이에 대해 분석하였다. 노출시간이 길수록, 확대배율이 클수록 형광신호는 더욱 강해지고, gain이 클수록 형광신호도 강해지지만, 배경신호도 함께 증가하여 SBR은 나빠질 수 있다. 제안한 시스템은 레이저 조사 방식으로 인해 작동거리가 짧은 경우 레이저 조사 영역의 강도 분포가 균일하지 못해서 형광신호가 약해지며, 그에 따른 해결방안을 제안하였다. In this paper, we introduced a near infrared fluorescence imaging system that has long working distance and analyzed on the effects of measurement variables such as gain, exposure time, working distance, magnification. Fluorescence signal intensity is growing up according to exposure time and magnification increasing, and it is getting stronger according to increase of gain, but the background signal intensity is getting stronger together. It causes low SBR. Due to a laser irradiation method, laser intensity distribution of the introduced system is not uniform and it makes fluorescence signal weak. So, we proposed a solution.
Temperature dependent luminescence of Dy3þ doped BaYF5 nanoparticles for optical thermometry
Zhongmin Cao,Shaoshuai Zhou,Guicheng Jiang,Yonghu Chen,Changkui Duan,Min Yin 한국물리학회 2014 Current Applied Physics Vol.14 No.8
Dy3þ doped BaYF5 nanoparticles with tetragonal structure were synthesized by hydrothermal method and solvothermal method. The structural and the luminescent properties of the samples were characterized by X-ray diffraction pattern, TEM and photoluminescence spectra. Emission of Dy3þ originated from 4I15/2 located at 450 nm and 4F9/2 located at 478 nm, 573 nm and 660 nm were observed under excitation of 355 nm laser. Behavior of fluorescence intensity ratio with temperature increasing from room temperature to approximately 800 K was investigated. And the optimum temperature range for thermometry is obtained to be 550e800 K according to its sensitivity-temperature relation, indicating the potential application of BaYF5:Dy3þ as a luminescent temperature sensor.
Optical temperature sensing properties of Yb3+/Tm3+ co-doped NaLuF4 crystals
Lili Tong,Xiangping Li,Ruinian Hua,Lihong Cheng,Jiashi Sun,Jinsu Zhang,Sai Xu,Hui Zheng,Yanqiu Zhang,Baojiu Chen 한국물리학회 2017 Current Applied Physics Vol.17 No.7
Yb3þ/Tm3þ and Yb3þ/Er3þ co-doped NaLuF4 crystals were synthesized by a facile hydrothermal method. The optical temperature sensing properties of Tm3þ based upon its two thermally coupled energy levels 3F2, 3 and 3H4 were systematically investigated by means of fluorescence intensity ratio (FIR) technique. The 980 nm laser-induced thermal effect on Tm3þ doped NaLuF4 crystals was studied by using Er3þ doped sample as thermal probe. The temperature sensitivity of Tm3þ in NaLuF4: Yb3þ/Tm3þ crystals shows a nonlinear dependence on temperature, and the maximum value is about 0.00045 K『1 at 600 K. The accuracy and reliability of the optical thermometry based on Tm3þ in NaLuF4: Yb3þ/Tm3þ crystals has been checked by using Yb3þ/Er3þ co-doped sample as temperature sensing unit. The results demonstrate that NaLuF4: Yb3þ/Tm3þ crystals have good sensing stability and may have potential application for the optical thermometry.
Linganna, K.,Agawane, G.L.,In, Jung-Hwan,Park, June,Choi, Ju H. Elsevier 2018 Journal of industrial and engineering chemistry Vol.67 No.-
<P><B>Abstract</B></P> <P>A series of Er<SUP>3+</SUP>/Yb<SUP>3+</SUP> co-doped fluorophosphate glasses with varying YbF<SUB>3</SUB> concentration were prepared by a high temperature melt quenching technique. Absorption and emission cross-sections were determined by using the McCumber theory. The larger emission cross-section (9.86×10<SUP>−21</SUP> cm<SUP>2</SUP>) and longer fluorescence lifetime (12.37ms) were obtained for the <SUP>4</SUP>I<SUB>13/2</SUB> → <SUP>4</SUP>I<SUB>15/2</SUB> transition of ABS3Er4Yb glass. The sensitivity and temperature of the maximum sensitivity were evaluated by the fluorescence intensity ratio method from the measured upconversion spectra. The results were discussed and compared to the other reported glasses.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Er<SUP>3+</SUP>/Yb<SUP>3+</SUP> co-doped fluorophosphate glasses were prepared and characterized. </LI> <LI> Judd–Ofelt intensity parameters and radiative properties were evaluated from the measured absorption spectra. </LI> <LI> The strong NIR emission observed at 1540nm and its spectroscopic were investigated. </LI> <LI> Temperature dependence upconversion studies were carried out for the thermal sensing behavior of the glasses. </LI> <LI> The sensitivity and temperature of the maximum sensitivity were evaluated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
K. Linganna,G.L. Agawane,인정환,박준,최주현 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.67 No.-
A series of Er3+/Yb3+ co-doped fluorophosphate glasses with varying YbF3 concentration were prepared by a high temperature melt quenching technique. Absorption and emission cross-sections were determined by using the McCumber theory. The larger emission cross-section (9.86 × 10−21 cm2) and longer fluorescence lifetime (12.37 ms) were obtained for the 4I13/2 → 4I15/2 transition of ABS3Er4Yb glass. The sensitivity and temperature of the maximum sensitivity were evaluated by the fluorescence intensity ratio method from the measured upconversion spectra. The results were discussed and compared to the other reported glasses.