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Hatice Altug

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Publications associées (123)

Plasmonic and Dielectric Metasurfaces for Molecular Specific Mid-IR Biosensors

Hatice Altug

Mid-infrared spectrum is powerful for biosensing application, as it encompasses the molecular vibrations that uniquely identify the biochemicals. Here, we will present our contributions using metal, graphene and dielectric based Mid-IR nanophotonics. ...

IEEE2018

Towards a point-of-care nanoplasmonic biosensor for rapid and multiplexed detection of pathogenic infections

Hatice Altug, Alexander Belushkin, Filiz Yesilköy, Xiaokang Li, Maria Soler Aznar

The implementation of multiplexed point-of-care biosensors is a top priority to address the current epidemic problems originated by widespread pathogenic infections, like those caused by viruses or bacteria. A rapid and accurate detection, identification, ...

SPIE-INT SOC OPTICAL ENGINEERING2018

Optofluidic nanoplasmonic biosensor for label-free live cell analysis in real time

Hatice Altug, Alexander Belushkin, Filiz Yesilköy, Xiaokang Li, Maria Soler Aznar

Cell signaling activities play a critical role in physiological and disease processes. The analysis of the tumor microenvironment or the immune system activation is nowadays providing valuable insights towards disease understanding and novel therapies deve ...

2018

Plasmonic nanohole array biosensor for label-free and real-time analysis of live cell secretion

Hatice Altug, Alexander Belushkin, Filiz Yesilköy, Xiaokang Li, Maria Soler Aznar, Cenk Ibrahim Özdemir

Cell secretion dynamics plays a central role in physiological and disease processes. Due to its various temporal profiles, it is essential to implement a precise detection scheme for continuous monitoring of secretion in real time. The current fluorescent ...

Royal Society of Chemistry2017

Breaking Lorentz reciprocity to overcome the time-bandwidth limit in physics and engineering

Hatice Altug, Kosmas Tsakmakidis

A century-old tenet in physics and engineering asserts that any type of system, having bandwidth Delta omega, can interact with a wave over only a constrained time period Delta t inversely proportional to the bandwidth (Delta t-Delta w similar to 2 pi). Th ...

American Association for the Advancement of Science2017

Double-layer graphene for enhanced tunable infrared plasmonics

Hatice Altug, Odeta Limaj, Daniel Rodrigo Lopez, Andreas Tittl

Graphene is emerging as a promising material for photonic applications owing to its unique optoelectronic properties. Graphene supports tunable, long-lived and extremely confined plasmons that have great potential for applications such as biosensing and op ...

Chinese Acad Sciences, Changchun Inst Optics Fine Mechanics And Physics2017

Multiplexed nanoplasmonic biosensor for one-step simultaneous detection of Chlamydia trachomatis and Neisseria gonorrhoeae in urine

Andrea Cavallini, Hatice Altug, Alexander Belushkin, Maria Soler Aznar

Development of rapid and multiplexed diagnostic tools is a top priority to address the current epidemic problem of sexually transmitted diseases. Here we introduce a novel nanoplasmonic biosensor for simultaneous detection of the two most common bacterial ...

2017

Nanoplasmonic mid-infrared biosensor for in vitro protein secondary structure detection

Giovanni Dietler, Hilal Lashuel, Francesco Simone Ruggeri, Hatice Altug, Dordaneh Etezadi, John Blaine Warner IV

Plasmonic nanoantennas offer new applications in mid-infrared (mid-IR) absorption spectroscopy with ultrasensitive detection of structural signatures of biomolecules, such as proteins, due to their strong resonant near-fields. The amide I fingerprint of a ...

Springer Nature2017

Plasmonic nanohole arrays on Si-Ge heterostructures: An approach for integrated biosensors

Liza Carol Andrea Dunbar, Hatice Altug, Dordaneh Etezadi, Cenk Ibrahim Özdemir

Nanohole array surface plasmon resonance (SPR) sensors offer a promising platform for high-throughput label-free biosensing. Integrating nanohole arrays with group-IV semiconductor photodetectors could enable low-cost and disposable biosensors compatible t ...

Spie-Int Soc Optical Engineering2016

Integrated angular tracking and plasmonic membrane surfaces for a point of a care refractive index sensor

Harry Heinzelmann, Marie-Claude Bay, Hatice Altug, Cenk Ibrahim Özdemir

We present an optical system which integrates a plasmonic sensing surface and an angular tracking system to enable a compact refractive index measurement. A refractive index change at the surface of the sensing membrane causes a change in the angle at whic ...

Spie-Int Soc Optical Engineering2016

Graphene as Enabling Material for Infrared Plasmonic Biosensors

Hatice Altug, Dordaneh Etezadi, Odeta Limaj, Daniel Rodrigo Lopez

We demonstrate a graphene infrared biosensor for chemical-specific label-free protein detection. Graphene plasmon resonances are dynamically tuned to enhance protein vibrational bands. We show that the extreme light confinement makes graphene plasmons extr ...

IEEE2016

Ultrafast and Broadband Tuning of Resonant Optical Nanostructures Using Phase-Change Materials

Vahagn Mkhitaryan, Hatice Altug, Arif Engin Cetin

Wiley-V C H Verlag Gmbh2016

Plasmon coupling in extended structures: Graphene superlattice nanoribbon arrays

Hatice Altug, Daniel Rodrigo Lopez

Interaction between localized plasmons in isolated proximal nanostructures is a well-studied phenomenon. Here we explore plasmon-plasmon interactions in connected extended systems. Such systems can now be easily produced experimentally using graphene. Howe ...

Amer Physical Soc2016

Infrared Plasmonic Biosensor for Real-Time and Label-Free Monitoring of Lipid Membranes

Hatice Altug, Dordaneh Etezadi, Odeta Limaj, Daniel Rodrigo Lopez

In this work, we present an infrared plasmonic biosensor for chemical-specific detection and monitoring of biomimetic lipid membranes in a label-free and real-time fashion. Lipid membranes constitute the primary biological interface mediating cell signalin ...

American Chemical Society2016

Infrared absorption spectroscopy

Hatice Altug

The present invention relates to an infrared absorption spectroscopy apparatus including an infrared transparent substrate comprising a first and second surface, an array of plasmonic nano-antennas arranged on the first surface of the infrared transparent ...

2016

Multi-resonant compact nanoaperture with accessible large nearfields

Hatice Altug, Dordaneh Etezadi, Serap Aksu, Arif Engin Cetin

We present a compact and multi-resonant aperture system supporting large local electromagnetic fields, which is highly advantageous for applications demanding high signal-to-noise ratio. The system is composed of subwavelength H-shaped apertures with exten ...

2015

Infrared Vibrational Molecular Hybridization with a Single Optical Antenna

Hatice Altug

We observe impedance matched coupling between molecular vibrations and infrared optical antennas. Broadband synchrotron near-field spectroscopy reveals antenna-vibration hybridization, mode splitting, and tip excitation of coupled dark plasmon modes. ...

IEEE2015

Field-portable optofluidic plasmonic biosensor for wide-field and label-free monitoring of molecular interactions

Hatice Altug, Arif Engin Cetin

We demonstrate a field-portable optofluidic plasmonic sensing device, weighing 40 g and 7.5 cm in height, which merges plasmonic microarrays with dual-wavelength lensfree on-chip imaging for real-time monitoring of protein binding kinetics. ...

IEEE2015

Plasmonic Nanoantennas on Nanopedestals for Ultra-Sensitive Vibrational IR-Spectroscopy

Hatice Altug, Dordaneh Etezadi, Arif Engin Cetin

We experimentally demonstrate that elevating polarization-insensitive nanoring antennas on nanopedestals enables high surface enhanced infrared absorption (SEIRA) signals. This is due to larger and accessible nearfields offering better overlap with biomole ...

IEEE2015

Theoretical and experimental analysis of subwavelength bowtie-shaped antennas

Hatice Altug, Dordaneh Etezadi, Serap Aksu, Arif Engin Cetin

Recently, bowtie-shaped apertures have received significant attention due to their extraordinary ability to generate dramatic field enhancement and light confinement in nanometer scale. In this article, we investigate both experimentally and theoretically ...

Brill Academic Publishers2015

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