cvitae.org - Vuckovic Group

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Interests

Broad Definition:

Experimental and theoretical research in quantum and nanoscale photonics.

Topics:

photonic crystal devices and integration
solid-state photonic quantum information technologies
cavity quantum electrodynamics (QED) in solid-state
nanofabrication

Please visit our Stanford University Page for more information: http://www.stanford.edu/group/nqp/

A Si square lattice Photonic Crystal. We use similar structures fabricated in GaAs for our QED efforts.

Publications

last modified 2007-03-23 22:57:32

CVitae -

Research

Surface Plasmon Resonator

by Yiyang Gong

Monday, 26 March 2007

Surface Plasmon Resonators are small

by Administrator

Sunday, 11 March 2007

Genetic Optimization of Photonic Bandgap Structures:

In my Junior and Senior year in Stanford, I worked with Ilya Fushman, Dirk Englund, and Jelena Vuckovic on the area of Photonic Crystal Design. We found that using Genetic Algorithms (also known as Evolutionary Algorithms), we were able to robustly design photonic crystals that met a wide range of design criteria. The figures below

Room Temperature Quantum Dot Photonics

by Ilya Fushman

Saturday, 13 January 2007

dipole type cavity for colloidal dot coupling

In this project we are pursuing a efficient Single Photon Source (SPS) for quantum information applications at room temperature. To this end, we are combining colloidal (CdSe, PbS, PbSe) quantum dots with photonic crystal cavities in a variety of materials (e.g. SiN, GaAs, AlGaAs, Si). The cavity serves to enhance the rate of photon emission, the efficiency of photon collection and identicity of the emitted photons. On the left you see spectra of PbS quantum dots coupled to a Photonic Crystal Cavity. The cavity is shown below.

by Dirk Englund

Friday, 12 January 2007

by Dirk Englund

Thursday, 06 December 2007

Towards on-chip quantum computers..

The idea of a quantum computer was first proposed by Richard Feynman in 1981 as a way to solve intractable quantum mechanical problems[1]. Since then, quantum computers were proven to quantum network.jpg be inherently superior at solving certain problem than their classical counterparts[2,3]. In addition, communication across quantum channels offers absolute security because it is impossible to eavesdrop on a transmission without disturbing it [4,5] To date, quantum computers have solved only trivial problems, and secure communication is limited to about 200 km [6]. Continued progress in computing and signal amplification in communication will require scalable systems that can perform basic quantum information processing functions. We have recently developed a technique to coherently probe an atomic system -- a semiconductor quantum dot -- that is strongly coupled to a photonic crystal nanocavity. The article is published in Nature[7].

On the web:

Nature: Controlling Cavity Reflectivity With a Single Quantum Dot, Dirk Englund, Andrei Faraon, Ilya Fushman, Nick Stoltz, Pierre Petroff, Jelena Vuckovic, Nature, vol. 450, number 7171, pp. 857-861 (2007)

- Stanford researchers develop a quantum "light switch" Stanford Report story (Dec. 7, 2007)

- Optics.org: Two teams unveil quantum-dot light switch (Dec. 7, 2007)

- Nanotechnology Now (Dec. 11, 2007)

- Pro-Physik (in German) (Dec. 12)

- Office of Naval Research - news

-On Cvitae: Dirk Englund, Andrei Faraon, Ilya Fushman, Jelena Vuckovic

My Senior Thesis

by Administrator

Sunday, 11 March 2007

Design of Photonic Crystal Cavities by Genetic Algorithms and Numerical Optimization Techniques:

This was my Senior Thesis, done in my Junior and Senior year in Professor Jelena Vuckovic's research group. The group's webpage can be accessed here. I investigated various algorithms for one-dimensional Photonic Crystal (DBR stack) design, such as Genetic Algorithms, Gradient Descent methods and Convex Optimization routines.