Greater than 10/sup 6/ optical isolation in integrated optoelectronic fluorescence sensor

Thrush, E.; Levi, Ofer; Cook, Laura J.; Smith, Stephen J.; Harris, James S.

doi:10.1109/iembs.2004.1403611

Cited by 4 publications

(5 citation statements)

References 1 publication

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“…4) for use in deep-red to near-infrared fluorescence studies. 54,55,[60][61][62][63][64] It consisted of a light source, a wavelength filter, and a photodetector, all micromachined on a single substrate. A second module was used for the microfluidic network containing the DNA sample, formed in PDMS.…”

Section: Demonstrated Devicesmentioning

confidence: 99%

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Optical filtering technologies for integrated fluorescence sensors

2007

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Numerous approaches have been taken to miniaturizing fluorescence sensing, which is a key capability for micro-total-analysis systems. This critical, comprehensive review focuses on the optical hardware required to attenuate excitation light while transmitting fluorescence. It summarizes, evaluates, and compares the various technologies, including filtering approaches such as interference filters and absorption filters and filterless approaches such as multicolor sensors and light-guiding elements. It presents the physical principles behind the different architectures, the state-of-the-art micro-fluorometers and how they were microfabricated, and their performance metrics. Promising technologies that have not yet been integrated are also described. This information will permit the identification of methods that meet particular design requirements, from both performance and integration perspectives, and the recognition of the remaining technological challenges. Finally, a set of performance metrics are proposed for evaluating and reporting spectral discrimination characteristics of integrated devices in order to promote side-by-side comparisons among diverse technologies and, ultimately, to facilitate optimized designs of micro-fluorometers for specific applications.

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Section: Demonstrated Devicesmentioning

confidence: 99%

“…In later work, Thrush incorporated metal sidewalls on the detector to enhance optical isolation and rejection levels. 62,64 Similarly, the Chediak architecture (Fig. 6) used positioning to avoid saturating the fluorescence collected by the CdS-protected detector.…”

Section: Advantages and Limitationsmentioning

confidence: 99%

Optical filtering technologies for integrated fluorescence sensors

2007

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“…A robotic assistant for tele-medicine applications must be equipped with non-invasive bio-sensors. Over the past years, much effort has been placed on developing non-invasive measurement techniques for biomedical applications (King, 2003;He, 2005;Bachiochi, 2005;Jubran, 1999;Webster, 1997;Puentes et al, 2007;Korsunsky et al, 2005;Thrush et al, 2004;Olesberg, 2004;Macknet et al, 2007;Kraitl and Ewald, 2005;Ewald and Kraitl, 2007;Spigulis et al, 2004;Spigulis, 2005;March, 2001;Waynant and Chenault, 1998;Cho et al, 2004;Yamakoshi et al, 2007). A number of such devices are based on utilising optical techniques.…”

Section: Non-invasive Biomedical Sensorsmentioning

confidence: 99%

“…There are various optical sensing methods for continuous non-invasive measurement of other bio-data, such as haemoglobin, glucose and many other blood contents (Puentes et al, 2007;Korsunsky et al, 2005;Thrush et al, 2004;Olesberg, 2004;Macknet et al, 2007;Kraitl and Ewald, 2005;Ewald and Kraitl, 2007;Spigulis et al, 2004;Spigulis, 2005;March, 2001;Waynant and Chenault, 1998;Cho et al, 2004;Yamakoshi et al, 2007;Jaundice Meter, 2008;Yasuda et al, 2003;Singh and Chauhan, 1989). Non-invasive haemoglobin measurements have many potential advantages including the accurate and continuous monitoring of anaemia.…”

Section: Non-invasive Biomedical Sensorsmentioning

confidence: 99%

Tele-doc: an open architecture robotic system for telemedicine applications

Osothsilp¹,

Pourboghrat²

2008

IJFIPM

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This paper describes a research study for the development and implementation of a prototype remote-controlled robotic assistant to doctors (Tele-Doc) for telemedicine applications. The development considers implementation issues concerning real-time and continuous patient monitoring and diagnosis, as well as tele-control interfacing techniques, mobile robot motion controller, reprogrammable embedded processing system, and internet-based robotic control centre. The paper also describes bio-data measurement techniques, as well as simple system architecture and its implementation.

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“…technologies [5][6][7][8][9][10][11]. Synthesis of new NIR sensitive organic semiconductors has been one of the focuses for researchers.…”

Section: Introductionmentioning

confidence: 99%

Towards high performance near infrared sensitive multilayer organic phototransistors: effects of the acceptor and its position

Tang

Dai

et al. 2022

Semicond. Sci. Technol.

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Due to its strong optical absorption in the near infrared (NIR) region, lead phthalocyanine (PbPc) is frequently used as the photoactive material in NIR sensitive organic phototransistors (OPTs). Limited by the low charge carrier mobility of NIR sensitive organic semiconductors, the active part of NIR OPTs adopts generally multilayer or multicomponent structure consisting of electron donor, electron acceptor and charge transporting molecules. Here, we investigate the effect of acceptor locations in the active structure on the performances of NIR phototransistors with PbPc as the photoactive electron donor. The performances of organic phototransistors with C60 layer lying on the top of PbPc [Si/SiO2/pentacene/PbPc/C60/Au (source and drain electrode, S&D)],above PbPc and Au source and drain electrode [Si/SiO2/pentacene/PbPc /Au (S&D) /C60)], and in the form of bulk-heterojunction with PbPc [Si/SiO2/pentacene/PbPc:C60 /Au(S&D)] were comparatively studied. The results show that the device with pentacene/PbPc:C60 exhibits the best performance among them. At an incident light intensity of 0.08 mW/cm2, a high photoresponsivity of 44.35 A/W, and specific detectivity of 1.08×1012 Jones are achieved.

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Greater than 10/sup 6/ optical isolation in integrated optoelectronic fluorescence sensor

Cited by 4 publications

References 1 publication

Optical filtering technologies for integrated fluorescence sensors

Optical filtering technologies for integrated fluorescence sensors

Tele-doc: an open architecture robotic system for telemedicine applications

Towards high performance near infrared sensitive multilayer organic phototransistors: effects of the acceptor and its position

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