Metal wire waveguide based all plasmonic refractive index sensor for terahertz frequencies

Padhy, Punnag; Sahu, P. K.; Jha, Rajan

doi:10.1016/j.snb.2015.09.005

Cited by 25 publications

(9 citation statements)

References 29 publications

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“…[3]. The copper wire waveguide can be operated in the amplitude sensitivity mode with a peak sensitivity of 59.9 RIU À1 [3]. Furthermore, the FOM values are higher than the ones reported in the literatures [40,41].…”

Section: Sensingmentioning

confidence: 88%

“…Compared with our Otto‐based SPR refractive index sensor, a plasmonics‐based refractive index sensor configuration using copper wire waveguide for terahertz frequencies was proposed in Ref. . The copper wire waveguide can be operated in the amplitude sensitivity mode with a peak sensitivity of 59.9 RIU −1 .…”

Section: Doped Monolayer Graphene‐based Spr Sensing Systemmentioning

confidence: 99%

“…Surface plasmon resonance (SPR) sensing is an important aspect of terahertz (THz) applications . As the research on the application of plasmonics in THz regime is attracting more attention, many progresses have taken place in the field of ultrasensitive THz sensing which inspiring the development of many new sensing technology.…”

Section: Introductionmentioning

confidence: 99%

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Tunable ultrasensitive terahertz sensing based on surface plasmon polariton of doped monolayer graphene

Huang

Zhong

Yao

et al. 2016

Physica Status Solidi (a)

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We reported the surface plasmon resonance (SPR) on doped monolayer graphene (MLG) for terahertz (THz) sensing of refractive index of testing samples using a prism‐coupling attenuated total reflection configuration. The theoretical detection range and sensitivity of the THz plasmonic sensor were investigated. The sensor performance in terms of variation of detection accuracy with different refractive index was explored. It was demonstrated that the Fermi level energy of MLG and also the gap distance between the prism base and the MLG had great effects on the performance of THz sensing. The gap distance not only caused the coupling resonance frequency shift in the reflection spectrum, but also affected the full width at half maxima (FWHM) of the SPR curve. The incident angle of THz radiation was also the key impact factor of the detection accuracy of the sensor. The effective SPR frequency could be tuned by controlling the incident angle or the Fermi level energy. The results revealed the maximum sensitivity of the THz plasmonic sensor up to 6.65 THz RIU−1 with a figure of merit (FOM) of 1187 RIU−1 for Fermi level energy ranges from 0.4 to 1.2 eV, making the sensor potential for ultra‐sensitive SPR sensing in the terahertz regime.

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Section: Sensingmentioning

confidence: 88%

Section: Doped Monolayer Graphene‐based Spr Sensing Systemmentioning

confidence: 99%

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Tunable ultrasensitive terahertz sensing based on surface plasmon polariton of doped monolayer graphene

Huang

Zhong

Yao

et al. 2016

Physica Status Solidi (a)

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“…Terahertz (THz) band is defined as the region of the electromagnetic spectrum ranging from 0.1 THz to 10 THz which is between the millimeter and far-infrared frequencies [1]. Very recently, the interest in this band of frequency has increased enormously because of its various potential applications such as sensing, medical imaging, and extremely broadband communication [2][3][4][5][6][7][8][9][10][11][12][13].…”

mentioning

confidence: 99%

An Accurate Circuit Model for Photoconductive Antennas

aghili¹,

Mahjoori²

2019

Preprint

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THz photoconductive antennas are among the most popular devices for THz wave generation and detection. A novel and accurate circuit is proposed to model the performance of such antennas, especially those which are frequency dependant. The suggested equivalent circuit consists of an external source voltage, a source input admittance, a loss resistance related to the electrode loss resistance, a frequency-dependant capacitance associated with capacitive behaviour of the gap between the electrodes, and a controlled voltagedependant source representing the screening of photo-carriers. Based on this model, the radiation from a simple frequency dependent antenna, i.e. a dipole antenna, is investigated. Excellent agreement is observed between the obtained results by the proposed equivalent circuit model and those by measurement.

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“…As a practical application of single wire structures, the very recent work in [523] is given as an example. The experimental setup scheme is shown in Fig.…”

Section: Surface and Plasmonic Waveguidesmentioning

confidence: 99%

Analysis and design of efficient passive components for the millimeter-wave and THz bands

Verdú¹,

Antonio²

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To my parents, brother and sister."Success is peace of mind which is a direct result of self-satisfaction in knowing you made the effort to become the best of which you are capable."Jonh Wooden "Lo que con mucho trabajo se adquiere, más se ama." Aristóteles AgradecimientosLa realización de esta tesis ha implicado no pocos años de trabajo y esfuerzo. Durante este importante periodo de mi vida han sido muchas las personas han estado a mi lado, brindándome su apoyo, ayuda, cariño y amor. Ya sea de una forma u otra, todas estas personas han contribuido a que este trabajo haya sido posible dando como fruto esta tesis. A todos ellos, me gustaría dedicarles un agradecimiento muy especial de todo corazón.Sin duda alguna, debo dar las gracias en primer lugar a mi director de tesis Mariano Baquero. Mariano, has sido un padre para mí profesionalmente hablando. Te conocí como alumno en las clases de Microondas, en las cuales me abriste la puerta a un conocimiento que me fascinó.Recuerdo perfectamente cuando fui a verte para preguntarte si podrías dirigirme el Proyecto Final de Carrera, y desde ese año 2009 hemos estado trabajando juntos. Quiero agradecerte no sólo haberme dado la oportunidad de trabajar en cada momento en elárea que más me ha gustado, sino el haberte preocupado por mí a nivel personal, velando siempre por mis intereses, ayudándome a desarrollarme personal y profesionalmente. Extiendo en este sentido mi agradecimiento a Miguel Ferrando. Si Mariano es el padre, tu serías sin duda el abuelo. Sin tu ayuda, la beca para la realización de esta tesis y los proyectos que han respaldado la misma no hubieran sido posibles. Tu esfuerzo ha permitido que el Grupo de Radiación Electromagnética (GRE) esté hoy dónde esta y que sus miembros nos beneficiemos de un entorno de trabajo excelente, produciendo trabajo de calidad. Debo agradecerte también tus siempre innovadoras ideas, algunas de las cuales se han convertido en una realidad plasmada en esta tesis.Una mención especial merece Daniel Sánchez. Dani, aunque tu nombre no figure como co-director bien sabes que podría estarlo. Jamás podré agradecerte lo suficiente la ayuda que me has prestado. Cuántas horas dedicadas a enseñarme en un sin fin de aspectos sin esperar nada a cambio, apoyándome también en los momentos difíciles, siempre presentes en una tesis. Bien sabes que lo mismo has hecho con cada uno tus compañeros, por eso eres el pilar del GRE Dani.Otra persona a la que estoy muy agradecido es a Vicente Boria. Tu activa colaboración en la dirección de esta tesis ha sido indispensable para la consecución de los resultados más relevantes de la misma. Sugeriste muy acertadamente una estancia en la Queen's University of Belfast, y me abriste la puerta a nuevas líneas de investigación en las cuales seguimos trabajando actualmente. Gracias por preocuparte por mi a nivel profesional y personal.En elámbito anterior, extiendo los agradecimientos a todo el GRE. It is also very important for me to acknowledge Prof. Vince Fusco. Thank you for hosting me in your group in Belfast ...

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Metal wire waveguide based all plasmonic refractive index sensor for terahertz frequencies

Cited by 25 publications

References 29 publications

Tunable ultrasensitive terahertz sensing based on surface plasmon polariton of doped monolayer graphene

Tunable ultrasensitive terahertz sensing based on surface plasmon polariton of doped monolayer graphene

An Accurate Circuit Model for Photoconductive Antennas

Analysis and design of efficient passive components for the millimeter-wave and THz bands

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