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Key interests:

Nanoscience, quantum dots, semiconductors, ultrafast spectroscopy, femtosecond lasers, nonlinear spectroscopy, excitons, relaxation dynamics, quantum dynamics, optoelectronic devices, solar cells, spintronics.

Welcome to our group!

 

 

 

We are an Ultrafast spectroscopy group located in the beautiful city of Montreal.

 

Our research focuses on ultrafast processes occurring in quantum dots. Quantum dots are nanoscale semiconductors placing themselves between the microscopic molecular limits traditionally studied by chemists and the macroscopic bulk limit studied by physicists. In this intermediate regime of size and quantum mechanics, they are also referred to as an artificial atoms. This situation presents a rich playground for investigating the basic science which is at the heart of nanoscience, as well as rationally applying these fundamental results to develop possibly disruptive technologies.

 In this regard, we study phenomena such as optical gain, multi-exciton generation, surface effects, exciton-phonon coupling and hot exciton relaxation dynamics. Gaining an understanding of these phenomena will be key to assess their strengths and weaknesses in optoelectronic devices applications such as quantum dots solar cells, LEDs, sensors and QD-lasers. More about our research can be found here.

 

 

In order to explore the basic science of quantum dots, we develop and implement sophisticated laser spectroscopies to interrogate these materials in real time. With electronic and nuclear motion taking place on very fast timescales, we use an even faster “camera” – a femtosecond laser – to freeze out these motions and watch the ways in which these systems behave. In our lab, we use lasers that produce pulses of 10 femtoseconds (10 millionth of a billionth of a second) in duration. We can control these laser pulses so as to enable a wide variety of state-of-the-art spectroscopies to be performed on these quantum dots, such as transient absorption ultrafast spectroscopy, time-resolved electronic spectroscopy and recently multidimensional electronic spectroscopy. More about our infrastructures and experiments can be found here.

 

 

 

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Text Box: Latest News



April 10th, 2013
Newsflash!
Optical switching is hot on the news-wire! Contratulations Jon, Mike, and Brenna! McGill Newsroom



March 27, 2013
Congratulations Dr. Tyagi!
Dr. (to be) Pooja Tyagi successfully defended her thesis today. Congratulations!

February 15, 2013
CONGRATULATIONS TO ALL!
"Challenge to the deep-trap model of the surface in semiconductor nanocrystals" has been published in PRB Rapid communication. Well Done Jonathan Mooney!


January 22, 2013
CONGRATULATIONS TO ALL!
"Terahertz Bandwidth All-Optical Modulation and Logic Using Multiexcitons in Semiconductor Nanocrystals" has been published in Nano Letters! Congrats Jon Saari!

January, 2013
Our new Picosecond time resolution Streak camera has arrived! Some very interesting work to be done.


November 17, 2012
CONGRATULATIONS TO ALL!
"Ultrafast Electron Trapping at the Surface of Semiconductor Nanocrystals: Excitonic and Biexcitonic Processes" has been published in JPC B! Congrats Jon Saari!

November, 2012
WE DID IT! The Kambhampati group now has a fully functonal 2D Electronic spectrometer with full polarization and phase control. Congrats Jon Saari, Pooja Tyagi, Brenna Walsh, and Amin Kabir! Results have been submitted to JPC A


September, 2012
The Kambhampati group now has a new post-doc! Welcome aboard Dr. Amin Kabir


April 10th, 2013
Newsflash!
Optical switching is hot on the news-wire! Contratulations Jon, Mike, and Brenna! McGill Newsroom



March 27, 2013
Congratulations Dr. Tyagi!
Dr. (to be) Pooja Tyagi successfully defended her thesis today. Congratulations!

February 15, 2013
CONGRATULATIONS TO ALL!
"Challenge to the deep-trap model of the surface in semiconductor nanocrystals" has been published in PRB Rapid communication. Well Done Jonathan Mooney!


January 22, 2013
CONGRATULATIONS TO ALL!
"Terahertz Bandwidth All-Optical Modulation and Logic Using Multiexcitons in Semiconductor Nanocrystals" has been published in Nano Letters! Congrats Jon Saari!

January, 2013
Our new Picosecond time resolution Streak camera has arrived! Some very interesting work to be done.


November 17, 2012
CONGRATULATIONS TO ALL!
"Ultrafast Electron Trapping at the Surface of Semiconductor Nanocrystals: Excitonic and Biexcitonic Processes" has been published in JPC B! Congrats Jon Saari!

November, 2012
WE DID IT! The Kambhampati group now has a fully functonal 2D Electronic spectrometer with full polarization and phase control. Congrats Jon Saari, Pooja Tyagi, Brenna Walsh, and Amin Kabir! Results have been submitted to JPC A


September, 2012
The Kambhampati group now has a new post-doc! Welcome aboard Dr. Amin Kabir


April 10th, 2013
Newsflash!
Optical switching is hot on the news-wire! Contratulations Jon, Mike, and Brenna! McGill Newsroom



March 27, 2013
Congratulations Dr. Tyagi!
Dr. (to be) Pooja Tyagi successfully defended her thesis today. Congratulations!

February 15, 2013
CONGRATULATIONS TO ALL!
"Challenge to the deep-trap model of the surface in semiconductor nanocrystals" has been published in PRB Rapid communication. Well Done Jonathan Mooney!


January 22, 2013
CONGRATULATIONS TO ALL!
"Terahertz Bandwidth All-Optical Modulation and Logic Using Multiexcitons in Semiconductor Nanocrystals" has been published in Nano Letters! Congrats Jon Saari!

January, 2013
Our new Picosecond time resolution Streak camera has arrived! Some very interesting work to be done.


November 17, 2012
CONGRATULATIONS TO ALL!
"Ultrafast Electron Trapping at the Surface of Semiconductor Nanocrystals: Excitonic and Biexcitonic Processes" has been published in JPC B! Congrats Jon Saari!

November, 2012
WE DID IT! The Kambhampati group now has a fully functonal 2D Electronic spectrometer with full polarization and phase control. Congrats Jon Saari, Pooja Tyagi, Brenna Walsh, and Amin Kabir! Results have been submitted to JPC A


September, 2012
The Kambhampati group now has a new post-doc! Welcome aboard Dr. Amin Kabir


April 10th, 2013
Newsflash!
Optical switching is hot on the news-wire! Contratulations Jon, Mike, and Brenna! McGill Newsroom



March 27, 2013
Congratulations Dr. Tyagi!
Dr. (to be) Pooja Tyagi successfully defended her thesis today. Congratulations!

February 15, 2013
CONGRATULATIONS TO ALL!
"Challenge to the deep-trap model of the surface in semiconductor nanocrystals" has been published in PRB Rapid communication. Well Done Jonathan Mooney!


January 22, 2013
CONGRATULATIONS TO ALL!
"Terahertz Bandwidth All-Optical Modulation and Logic Using Multiexcitons in Semiconductor Nanocrystals" has been published in Nano Letters! Congrats Jon Saari!

January, 2013
Our new Picosecond time resolution Streak camera has arrived! Some very interesting work to be done.


November 17, 2012
CONGRATULATIONS TO ALL!
"Ultrafast Electron Trapping at the Surface of Semiconductor Nanocrystals: Excitonic and Biexcitonic Processes" has been published in JPC B! Congrats Jon Saari!

November, 2012
WE DID IT! The Kambhampati group now has a fully functonal 2D Electronic spectrometer with full polarization and phase control. Congrats Jon Saari, Pooja Tyagi, Brenna Walsh, and Amin Kabir! Results have been submitted to JPC A


September, 2012
The Kambhampati group now has a new post-doc! Welcome aboard Dr. Amin Kabir


April 10th, 2013
Newsflash!
Optical switching is hot on the news-wire! Contratulations Jon, Mike, and Brenna! McGill Newsroom



March 27, 2013
Congratulations Dr. Tyagi!
Dr. (to be) Pooja Tyagi successfully defended her thesis today. Congratulations!

February 15, 2013
CONGRATULATIONS TO ALL!
"Challenge to the deep-trap model of the surface in semiconductor nanocrystals" has been published in PRB Rapid communication. Well Done Jonathan Mooney!


January 22, 2013
CONGRATULATIONS TO ALL!
"Terahertz Bandwidth All-Optical Modulation and Logic Using Multiexcitons in Semiconductor Nanocrystals" has been published in Nano Letters! Congrats Jon Saari!

January, 2013
Our new Picosecond time resolution Streak camera has arrived! Some very interesting work to be done.


November 17, 2012
CONGRATULATIONS TO ALL!
"Ultrafast Electron Trapping at the Surface of Semiconductor Nanocrystals: Excitonic and Biexcitonic Processes" has been published in JPC B! Congrats Jon Saari!

November, 2012
WE DID IT! The Kambhampati group now has a fully functonal 2D Electronic spectrometer with full polarization and phase control. Congrats Jon Saari, Pooja Tyagi, Brenna Walsh, and Amin Kabir! Results have been submitted to JPC A


September, 2012
The Kambhampati group now has a new post-doc! Welcome aboard Dr. Amin Kabir