Ivan Avrutsky

 

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Waveguide Gratings
 

A HfO2 planar waveguided with a grating coupler (from Optics Express - 2006)

Anisotropic waveguides (from APL-2005)

 Diffractive imaging microspectrometer (from SPIE-2006)

 

 
Integrated Optics

 

Integrated optics (integrated photonics) is optics of devices and systems that are implemented within a common guided wave carrier, typically a planar waveguide or a network of channel waveguides. Similar to integrated circuits in microelectronics, integrated optics provides inexpensive mass production of small in size yet rather complex and versatile optical systems.

 

Practical large-scale realization of the concept is proven to be challenging because the materials usually used to work with light – glasses, transparent polymers, nonlinear, electro-optical, and magneto-optical crystals, semiconductors, liquid crystals, metals – are technically not easy to combine on a single wafer.

 

Industrial applications of integrated optical devices and systems are mainly in the areas of optical communication and sensors. Examples include wavelength (de)multiplexers based on arrayed waveguide gratings, optical add/drop multiplexers, optical splitters/combiners, switches and modulators, isolators, e.t.c. Sensors employing guided wave resonances allow for reliable detection of a sub-monolayer adhesion layer bound to the waveguide surface.    

While glass-based passive integrated optics and active devices based on lithium niobate or electro-optical polymers have been a subject of development in recent decades, further progress is likely to rely on the use of the CMOS processing well-developed in microelectronics, and thus use of CMOS-compatible materials in integrated optics. In particular, silicon-on-insulator (SOI) structures with proper thickness of the device and buffer layers happen to be perfect optical waveguides that show strong light confinement and low optical losses.

Publications:

Our publications attributed to this category deal mainly with the design, fabrication, characterization, and numerical simulation of various optical waveguides and waveguide-based devices. Recent work covers a super-compact integrated-optical/micro-optical diffractive imagine spectrometer. The device is patented. This research was featured by Optics.org and Michigan Small Tech.

 

[84] SPIE Proceedings v. 6388 (2006), “Diffractive Imaging Micro-Spectrometer.”

[83] Applied Optics (2006), “Concept of a miniature optical spectrometer using integrated optical …”

[82] NSTI-Nanotech 2006 (2006), “Optical Micro-Spectrometer with Sub-Nanometer Resolution.”

[81] Optics Express (2006), “A simple miniature optical spectrometer with a planar waveguide grating …”

[80] Applied Optics (2006), “Model-independent method for the determination of guiding thin film …”

[79] Optics Express (2006), “Sub-micron grating fabrication on hafnium oxide thin-film waveguides …”

[77] Physical Review A (2005), “Design of an integrated optical source of twin photons.”

[76] Applied Physics Letters (2005), “Refractive indices of ZnSiN2 on r-plane sapphire.”

[69] Applied Optics (2004), “High-resolution photometric optical monitoring for thin films deposition.”

[68] J. Optical Society of America B (2003),Reduced surface roughness of solid thin films prepared by …”

[65] Applied Physics Letters (2003), “Optical filtering by leaky guided modes in macro-porous silicon.”

[64] J. Optical Society of America A (2003), “Guided Modes in a Uniaxial Multilayer.”

[55] SPIE Proceedings (2000), “Numerical analysis of integrated optical switches/modulators: performance …”

[14] Soviet J. of Quantum Electronics (1987), “Planar waveguides with leaky modes and determination …”

 

   
 

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