Recherche

Afficher tous les résultats pour

Accueil

Personne

Hatice Altug

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (123)

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

Nano-optics gets practical

Hatice Altug

The advent of nanotechnology has allowed scientists to study light–matter interactions at the nanoscale. A considerable amount of fundamental knowledge has accumulated in the past two decades and the field of nano-optics may now in fact be on the cusp of d ...

Nature Publishing Group2015

Mid-infrared plasmonic biosensing with graphene

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

Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric-size molecules. We exploit the unique electro-optical properties o ...

American Association for the Advancement of Science2015

Engineering mid-infrared nanoantennas for surface enhanced infrared absorption spectroscopy

Hatice Altug, Serap Aksu

Mid-infrared absorption spectroscopy is a powerful tool for optically probing the molecular structure of biological samples. However, using conventional approaches, IR measurements on small quantities of molecules are extremely challenging due to sensitivi ...

Elsevier2015

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

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

Nonlinear Midinfrared Photothermal Spectroscopy Using Zharov Splitting and Quantum Cascade Lasers

Hatice Altug, Mi Kyung Hong, Shyamsunder Erramilli

We report on the Mid-infrared nonlinear photothermal spectrum of the neat liquid crystal 4-octyl-4'-cyanobiphenyl (8CB) using a tunable Quantum Cascade Laser (QCL). The nonequilibrium steady state characterized by the nonlinear photothermal infrared respon ...

2014

Ultra-sensitive time-resolved infrared spectroscopy of biomolecule interactions with plasmonic nanoantennas

Hatice Altug

We demonstrate a plasmonically enhanced infrared spectroscopy technology that enables in-situ and real-time measurements of protein and nano particle interactions at ultra-high sensitivity by overcoming fundamental water absorption limitations. (C) 2014 Op ...

IEEE2014

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

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

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

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

Engineered Absorption Enhancement and Induced Transparency in Coupled Molecular and Plasmonic Resonator Systems

Hatice Altug, Shyamsunder Erramilli

Coupled plasmonic resonators have become the subject of significant research interest in recent years as they provide a route to dramatically enhanced light-matter interactions. Often, the design of these coupled mode systems draws intuition and inspiratio ...

2013

In-situ ultra-sensitive infrared absorption spectroscopy of biomolecule interactions in real time with plasmonic nanoantennas

Hatice Altug

Infrared absorption spectroscopy is a powerful biochemical analysis tool as it extracts detailed molecular structural information in a label-free fashion. Its molecular specificity renders the technique sensitive to the subtle conformational changes exhibi ...

Nature Research2013

Integrated Plasmonic NanoBiosensors

Hatice Altug, Serap Aksu

We will demonstrate plasmonic and metamaterial based integrated nano-biosensors and ultrasensitive infrared absorption spectroscopy. These systems by enabling monitoring of molecular-protein interactions in real-time within aqueous solutions can be importa ...

IEEE2013

Multi-Band Surface Enhanced Infrared Absorption Spectroscopy of Molecular Monolayers

Hatice Altug

We develop concepts for engineering multi-resonant infrared plasmonic antennas. We utilize these antennas in conjunction with a perfect absorber geometry to simultaneously enhance mid-infrared vibrational resonances separated by 3 mu m in in monolayer poly ...

IEEE2013

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

Page 6 sur 7