Publications by Arif Engin Cetin

Fabrication of Sub-10-nm Plasmonic Gaps for Ultra-Sensitive Raman Spectroscopy

The past two decades have witnessed the explosion of activities in the field of surface enhanced Raman spectroscopy (SERS). SERS platforms employ nano-structures that excite plasmonic modes with large local electromagnetic fields localized within small gap ...

SPRINGER2020

Plasmonic Nanohole Arrays on Hybrid Substrate For Highly Sensitive Label-Free Biosensing

Arif Engin Cetin

A biosensor device including a metal layer, a transparent substrate layer, and a dielectric layer, wherein the metal layer includes a plurality of sub-wavelength apertures, and wherein the dielectric layer is located between the metal layer and the transpa ...

2017

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

Dual-band plasmonic resonator based on Jerusalem cross-shaped nanoapertures

Hatice Altug, Arif Engin Cetin, Shyamsunder Erramilli

In this paper, we both experimentally and numerically introduce a dual-resonant metamaterial based on subwavelength Jerusalem cross-shaped apertures. We numerically investigate the physical origin of the dual-resonant behavior, originating from the constit ...

Elsevier2015

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

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

Plasmonic Nanohole Arrays on a Robust Hybrid Substrate for Highly Sensitive Label-Free Biosensing

Hatice Altug, Dordaneh Etezadi, Arif Engin Cetin, Mickaël Pierre Busson, Yasa Eksioglu Özok

Plasmonic nanohole arrays have received significant attention, as they have highly advantageous optical properties for ultrasensitive and label-free biosensing applications. Currently, most of these subwavelength periodic apertures are mainly implemented o ...

Amer Chemical Soc2015

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

Three-Dimensional Crystalline and Homogeneous Metallic Nanostructures Using Directed Assembly of Nanoparticles

Hatice Altug, Arif Engin Cetin, Jun Huang

Directed assembly of nano building blocks offers a versatile route to the creation of complex nanostructures with unique properties. Bottom-up directed assembly of nanoparticles have been considered as one of the best approaches to fabricate such functiona ...

2014

Lensfree optofluidic plasmonic sensor for real-time and label-free monitoring of molecular binding events over a wide field-of-view

Hatice Altug, Arif Engin Cetin

We demonstrate a high-throughput biosensing device that utilizes microfluidics based plasmonic microarrays incorporated with dual-color on-chip imaging toward real-time and label-free monitoring of biomolecular interactions over a wide field-of-view of > 2 ...

Nature Publishing Group2014

Handheld high-throughput plasmonic biosensor using computational on-chip imaging

Min Huang, Hatice Altug, Arif Engin Cetin

We demonstrate a handheld on-chip biosensing technology that employs plasmonic microarrays coupled with a lens-free computational imaging system towards multiplexed and high-throughput screening of biomolecular interactions for point-of-care applications a ...

2014

Dynamic Tuning of Surface Plasmon Polaritons via Thermally Controlled Liquid Crystals

Min Huang, Hatice Altug, Arif Engin Cetin, Shyamsunder Erramilli

We present a thermally controlled plasmonic substrate in contact with a liquid crystal offering spectral tunings similar to 18.7 nm within similar to 18 degrees C at LC nematic phase. Nematic/ isotropic transition also enables similar to 12 nm spectral cha ...

IEEE2014

Hand-Held Plasmonic Biosensor for High-Throughput Sensing for Point-of-Care Applications

Min Huang, Hatice Altug, Arif Engin Cetin

We introduce a hand-held biosensor based on large-area plasmonic microarrays coupled with a lens-free computational imaging system for high-throughput biosensing. Our light-weight device, 60 g and 7.5 cm, is highly suitable for point-of-care applications f ...

IEEE2014

Effective Delivery of Analytes with Optofluidics for Ultrasensitive Biodetection

Min Huang, Hatice Altug, Arif Engin Cetin

We present a plasmonic nanobiosensor offering superior analyte delivery efficiency. Our experiments with virus-like analytes show more than an order of magnitude faster response time, and seven orders-of-magnitude dynamic concentration range for 10(3)-10(9 ...

IEEE2014

Accessible Nearfields by Nanoantennas on Nanopedestals for Ultrasensitive Vibrational Spectroscopy

Hatice Altug, Dordaneh Etezadi, Arif Engin Cetin

Wiley-V C H Verlag Gmbh2014

Actively transporting virus like analytes with optofluidics for rapid and ultrasensitive biodetection

Min Huang, Hatice Altug, Arif Engin Cetin

Effective analyte delivery is essential to achieve rapid and sensitive biodetection systems. In this article, we present an actively controlled fluidic system integrated with a suspended plasmonic nanohole sensor to achieve superior analyte delivery effici ...

2013

Asymmetric Ring/Disk Nanocavities on Conducting Substrates for Strong Fano-Interference

Hatice Altug, Arif Engin Cetin

We introduce a Fano resonant asymmetric ring/disk cavity system employing a conducting layer underneath. Our system shows stronger electromagnetic fields that are highly accessible to surrounding medium and sharper spectral features that result in more rel ...

IEEE2013

Thermal Tuning of Surface Plasmon Polaritons Using Liquid Crystals

Min Huang, Hatice Altug, Arif Engin Cetin, Shyamsunder Erramilli

Wiley-V C H Verlag Gmbh2013

Plasmonically Enhanced Vibrational Biospectroscopy Using Low-Cost Infrared Antenna Arrays by Nanostencil Lithography

Hatice Altug, Serap Aksu, Arif Engin Cetin

2013