Nano-Photonics Group



 

 

Photonic Integrated Circuits

We develop novel and low cost devices, including arrayed waveguide gratings,  for a wide range of photonic applications.  We are also investigate quantum well intermixing for  monolithic integration of active and passive semiconductor devices.  We fabricated the first semiconductor arrayed waveguide gratings for coarse wavelength division multiplexing and demonstrated a world-record 200 nm band gap shift for ion-implanted GaAsSb quantum wells.

PowerPoint Presentation

Arrayed Waveguide Gratings

Journal Publications:

“Broadband Arrayed Waveguide Gratings on InP,” Kameron Rausch, D. G. Geraghty, N. Eradat, N. Peyghambarian, and Alan R. Kost, to be published in Opt. and Quantum Electron..

“Design and Fabrication of a Broadband Polarization and Temperature Insensitive Arrayed Waveguide Grating on InP,” Nasuhi Yurt, Kameron Rausch, Alan R. Kost, and Nasser Peyghambarian, Opt. Express, 13 (14), pp. 5535 - 5541 (2005).

Text Box: Semiconductor arrayed waveguide gratings, just a few mm long, separate wavelengths for optical communication networks. AWG OutputAWGStar Coupler

 

 

This material is based upon work supported by the National Science Foundation under Grant No. 0224238.

Quantum Well Intermixing                                                                                                           

Journal Publications:

“Large Blue Shift of the Band Gap of GaAsSb/AlSb Quantum Wells with Ion Implantation,” Xiaolan Sun, Nasser Peyghambarian, Alan R. Kost, and Nayer Eradat, Appl. Phys. Lett. 86, 011905, pp. 1-3 (2005).

“Enhanced Photoluminescence from GaAsSb Quantum Wells,” Alan R. Kost, Xiaolan Sun, Nasser Peyghambarian, Nayer Eradat, Espen Selvig, Bjorn-Ove Fimland, and David H. Chow, Appl. Phys. Lett. 85 (23), pp. 5631-5633 (2004).

“Suppression of Intervalley Scattering in Ga(As)Sb Quantum Wells,” K. C. Hall, S. W. Leonard, H. M. Van Driel, A. R. Kost, and E. Selvig, Applied Physics Letters, 77, pp. 2882-2884 (2000).

“Subpicosecond Spin Relaxation in GaAsSb Multiple Quantum Wells,” K. C. Hall, S. W. Leonard, and H. M. van Driel, A. R. Kost, E. Selvig, and D. H. Chow, Applied Physics Letters, 75, pp. 4156-4158 (1999).

Quantum Well Intermixing

 

 

 

 

 

 

 

 

 

 

 

This material is based upon work supported by the National Science Foundation under Grant No. 0224238.

Nano-Optics

Text Box: The nano-photonics group uses FDTD (finite difference time domain) software to simulate nano-optical effects like the transmission of light through sub-wavelength apertures.  We are attempting to fabricate blue VSALs (nitride semiconductor lasers with a very small aperture on the output facet) for ultra-high density optical data storage. PowerPoint Presentation FDTD Simulation
Text Box: Flexible mirrors can be used as optical phase modulators for optical communications, adaptive optics, and sensing of magnetic fields. The nano-photonics group fabricates reflective, magnetic membranes, that are flexed with an applied current.  Unlike electrostatically controlled membranes, magnetic mirrors can be driven with a volt or less - making them compatible with silicon VLSI. The plan is to scale the mirrors to nanometer dimensions. Journal Publication: “Magnetically Actuated Optical Phase Modulator,” Alan R. Kost, Lili Xiao, and Kameron Rausch, Optical Engineering 44 (8), 08502, pp. 1-2 (2005).

Flexible Magnetic Mirrors

Magnetic Mirror

Integrated Bio-Sensor
 

Journal Publication:

“Hydrid Glass and Sol-Gel Integrated Optical Waveguides for Absorption-Based Biosensing,” N. Yurt, I. E. Araci, C. T. DeRose, S. Honkanen, S. B. Mendez, Alan R. Kost, and N. Peyghambarian, submitted to J. of Applied Physics.

Text Box: An environmentally stable, compact, and inexpensive sensing device that can be applied to a wide range of biological and chemical species.