Optical properties of pulsed laser deposited amorphous (GeSe2)100−x –Bi x films

Pan, Ruikun; Tao, Haizheng; Zang, H.C.; Zhao, Xiujian; Zhang, T. J.

doi:10.1007/s00339-010-5632-1

Cited by 10 publications

(6 citation statements)

References 27 publications

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“…4 and it is observed that band gap decreases with increase in concentration of bismuth. The addition of bismuth provides localized states that lead to decrease in band gap [14]. However, the lower value of band gap of (GeSe 3.5 ) 100 Bi 0 thin film than that of (GeSe 3.5 ) 90 Bi 10 and (GeSe 3.5 ) 86 Bi 14 thin films is due to its Tables 1 and 2.…”

Section: Resultsmentioning

confidence: 85%

“…UV poling of (GeSe 3.5 ) 100-x Bi x (x=0, 10,14) and Zn x S y Se 100-x-y (x=2, y=28; x=4, y=20; x= 6, y=12; x=8, y=4) chalcogenide thin films is performed by applied dc voltage of 4 kV together with irradiation of nitrogen laser at 337 nm for an hour and 30 min. The reflected s-polarized second harmonic signals are measured for s-polarized incident beam that are used for estimation of second order optical nonlinear susceptibility (χ (2) ) .…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Optical second order nonlinearity in ultraviolet poled chalcogenide thin films

Rani

Mohan

Kumar

et al. 2015

J Opt

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The second order optical nonlinear susceptibility measurement is done in (GeSe 3.5 ) 14) and Zn x S y Se 100-x-y (x=2, y=28; x=4, y=20; x=6, y=12; x=8, y=4) chalcogenide thin films. Thermal evaporation technique is used for the preparation of thin films. The dielectric constant at incident and second harmonic wavelength is calculated using BPARAV^computer software. The large second order nonlinearity is induced through ultraviolet poling by applying a dc electric field and irradiating with nitrogen laser at 337 nm. Thin film is irradiated with~532 nm wavelength of Nd: YAG laser and second harmonic signal at~266 nm wavelength alongwith incident light is obtained in reflection that is separated from~532 nm using a suitable optical filter. Second order nonlinear susceptibility is estimated by measuring the intensity of reflected beam of second harmonic signal that is found to increase with increase in Bi and Zn content in (GeSe 3.5 ) 100-x Bi x , and Zn x S y Se 100-x-y chalcogenide thin films, respectively. The induced second order optical nonlinearity shows the use of chalcogenide thin films in wavelength conversion and active devices.

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Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Optical second order nonlinearity in ultraviolet poled chalcogenide thin films

Rani

Mohan

Kumar

et al. 2015

J Opt

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“…Consequently, this approach adeptly addresses the challenges associated with accurate sampling, effective separation of multiple compounds, reliable detection of trace substances, and the mitigation of salt-induced interference at unicellular analysis (Fujii et al, 2015;Root et al, 2017). The extremely low flow rate of nano-ESI (up to 25 nL/min) also provides a longer MS analysis time, which effectively improves the ability of multistage MS to elucidate the structure of unknown compounds (Zhang et al, 2018c). In addition, combining CE and nano-LC can better separate and gradient elute different compounds, eliminate signal interference from impurity molecules, and achieve simultaneous quantification of different compounds in single cells (Cong et al, 2020).…”

Section: Single-cell Ms Methodologies Based On Four Ionization Techni...mentioning

confidence: 99%

Recent developments in ionization techniques for single-cell mass spectrometry

Zeng,

Xia,

Yin

et al. 2023

Front. Chem.

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The variation among individual cells plays a significant role in many biological functions. Single-cell analysis is advantageous for gaining insight into intricate biochemical mechanisms rarely accessible when studying tissues as a whole. However, measurement on a unicellular scale is still challenging due to unicellular complex composition, minute substance quantities, and considerable differences in compound concentrations. Mass spectrometry has recently gained extensive attention in unicellular analytical fields due to its exceptional sensitivity, throughput, and compound identification abilities. At present, single-cell mass spectrometry primarily concentrates on the enhancement of ionization methods. The principal ionization approaches encompass nanoelectrospray ionization (nano-ESI), laser desorption ionization (LDI), secondary ion mass spectrometry (SIMS), and inductively coupled plasma (ICP). This article summarizes the most recent advancements in ionization techniques and explores their potential directions within the field of single-cell mass spectrometry.

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“…15 Aer that, the addition of bismuth results in a considerable variation in linear and nonlinear optical properties as well as the structural phenomenon of the host system, in addition to carrier type reversal (CTR). 16,17 For example, in addition to the CTR, the Bi doping also showed a large variation in the linear and nonlinear optical properties in the Bi x In 25Àx -Se 75 thin lms. 18 The replacement of indium with bismuth provides a constant coordination number (Z ¼ 2.25) that represented the structure in the oppy state which helps to determine the modications in the network topology apart from the CTR behavior of the Bi-In-Se system.…”

Section: Introductionmentioning

confidence: 99%