MOCVD Grown Ga NAl Ga N Quantum Cascade

  • Slides: 9
Download presentation
MOCVD Grown Ga. N/Al. Ga. N Quantum Cascade Detectors Pranav Badami, 1 Yu Song,

MOCVD Grown Ga. N/Al. Ga. N Quantum Cascade Detectors Pranav Badami, 1 Yu Song, 1 Chung-En Zah 2, Rajaram Bhat 2, Claire F. Gmachl 1 1 – Princeton University, Princeton, NJ 08544, USA 2 – Corning Incorporated, Corning, NY 14831, USA 1

Internship Information • Mid-Infrared Technologies for Health and Environment: Princeton, NJ • Trace Gas

Internship Information • Mid-Infrared Technologies for Health and Environment: Princeton, NJ • Trace Gas Detection * GAS (> Quantum Cascade Detector 2

Environmental Applications http: //kassowal. com/wallpaper/Animal-wallpaper/Cow/2. jpg http: //csmres. co. uk/cs. public. upd/article-images/Oil-rig 2. jpg

Environmental Applications http: //kassowal. com/wallpaper/Animal-wallpaper/Cow/2. jpg http: //csmres. co. uk/cs. public. upd/article-images/Oil-rig 2. jpg Applications: - Greenhouse gas sensing - Methane leaks - Farm monitoring http: //www. junksciencearchive. com/Greenhouse/

Challenges • Methane absorbs 3. 2 micron • Requires new material system – –

Challenges • Methane absorbs 3. 2 micron • Requires new material system – – Ga. N/Al. Ga. N 4

Ga. N / Al. Ga. N QCD Necessities: • Scalable production • Low-wavelength detection

Ga. N / Al. Ga. N QCD Necessities: • Scalable production • Low-wavelength detection • High-speed detection 5

Improvements Metal Organic Chemical Vapor Deposition (MOCVD) Ga. N : large conduction band offset

Improvements Metal Organic Chemical Vapor Deposition (MOCVD) Ga. N : large conduction band offset Al. Ga. N : reduced scattering lifetime 6

Fabrication and Testing - Many hours in the cleanroom - Processed detector device with

Fabrication and Testing - Many hours in the cleanroom - Processed detector device with windows on top 7

Results and Measurements Photocurrent Spectrum Noise - Low noise and photocurrent for short wavelengths.

Results and Measurements Photocurrent Spectrum Noise - Low noise and photocurrent for short wavelengths. - First of it’s kind to be commercially viable! 8

Acknowledgements and Future Plans Summary: First MOCVD grown Ga. N/Al. Ga. N quantum detector

Acknowledgements and Future Plans Summary: First MOCVD grown Ga. N/Al. Ga. N quantum detector Skills: presented work, coauthored conference paper ITQW 2013, Cleanroom, presentation, semiconductors Thank you to the PEI Grand Challenges program for the opportunity and funding. 9