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Research in M.H.Z group


We work on physics and applications of high-Q optical microresoantors with emphasis on circular microresonators in particular. These resoantors have been subject of intensive research during the past few years owing to their unique features.  Enabling long photon lifetime in a small volume is the most important characteristic of these resonators.  Long photon lifetime translates into long interaction length and large power build-up factor while small volume results in high intensity. As a result using these devices one can reduce the power and the volume required for many interactions by orders of magnitude. High-Q microresonators are versatile devices with a large variety of applications from optical communication and microwave-photonics to sensing and metrology. These devices have been used as building blocks for high-Q optical filters, optical modulators, photonic microwave receivers, optoelectronic oscillators, high sensitivity chemical and biological sensors, small narrow linewidth lasers, and recently optomechanical oscillators. In addition to their versatile engineering application, high-Q microresonators are also used as platforms for fundamental research in light-matter interaction. For example ultra-high-Q silica microtoroid resonator (a special type of high-Q circular microresonator) is a unique device for exploring the physics of optomechanical interaction, nonlinear optical phenomena and cavity quantum electrodynamics (cQED).

Currently our research is mainly focused on resonant photonic and RF-photonic sensing techniques and devices. In particular we investigate technologies and methods that enable high sensitivity biomarker detection in a low-cost and compact device for medical diagnostic. 


Dr Hossein-Zadeh is the recipient of National Science Foundation (NSF) CAREER AWARD (2011)
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A. Research areas:
   
     1) Photonic biose
nsing
     2) Optomechanical oscillation
     3) Fabrication of high-Q Near-IR Whispering-Gallery (WG) resonators (optical, electro-optical and optomechanical)
     4) Mid-IR WGM microresonators and lasers   
     5) Resonant microwave photonic devices and systems
     6) Physics and properties of high-Q optical microresonators
     7) Fluidic WGM optical microresonators 

B. Previous projects and research topics

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Our research is funded by:

National Science Foundation      Airforce Office of Scientifc Research      Office of Vice President for Research

and supported by :

                   

Center for Integrated Nanotechnologies            Los Alamos National Laboratory 
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Current funding:
1-NSF CMMI-DCSD (co-PI): "Dynamics of Coupled Heterogenous Oscilllators with Applicaitons to Biological Systems"
2-UNM OVPR (PI): Junior Faculty Collaborative Research Grant
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Past funding:
1-AFOSR (co-PI): Optoelectronic Research Center at UNM CHTM (block grant)
2-NSF NUE (co-PI): "An Integrated Multidisciplinary Nanotechnology Undergraduate Education Program at the University of New Mexico"
3-NSF EPMD (PI): "Compact Narrow-linewidth Microresonator- Based Mid-IR Sources for Ultra-Sensitive Molecular Detection" 
4-NSF EPDT CAREER (PI): "Radiation Pressure Based Optomechanical RF Signal Processing and Sensing"