Krishna Infrared Detector K.I.N.D. Laboratory
Mission Statement
Through research in infrared detection and imaging, we train and educate engineers, advance the frontiers of science, and develop technologies that benefit humanity.
Research
We here at the KIND Engineering research group have 3 dedicated labs that we use on a daily basis: AMBER for molecular beam epitaxial (MBE) growth of infrared (low bandgap) semiconductors, OASIS for the characterization of infrared-responsive materials, and MICA for the characterization of infrared detectors and imagers.
AMBER (Antimonide MBE Reactor)
AMBER is an Antimonide-containing Molecular Beam Epitaxial Reactor. AMBER deposits 1-atom thick layers of elements to grow designed semiconductor materials. AMBER is specifically designed to support the growth of superlattice structures (SLS) containing antimony. Antimony-bearing superlattices can be designed to respond to photons across the infrared spectrum while still providing degrees of freedom to control the carrier dynamics. AMBER contains ports to introduce up to 12 elements, and it is currently configured to grow materials with gallium, indium, aluminum, antimony, or arsenic as the constituents and silicon, beryllium, or gallium telluride as the dopants. AMBER is part of the SEAL user-facility.
OASIS (Optical And Structural screening of Infrared Semiconductors) lab
The Optical Analysis and Screening of Infrared Semiconductors (OASIS) lab houses custom and commercial instruments to analyze infrared semiconductors. A Fourier Transform Infrared (FTIR) spectrometer measures absorption, reflection, and photoluminescence. A microwave-reflectance lifetime system measures the dynamic response of semiconductors to optical excitation. OASIS includes an automated sample mapping system that measures photoluminescence and lifetime at user-specified points across a semiconductor wafer. All of the measurements can be performed at a range of temperatures to provide more detailed information about the materials. One research goal is to demonstrate that these early, rapid measurements of wafers can predict final performance characteristics and, therefore, screen material before further processing. OASIS is part of the SEAL user-facility.
MICA (Mid Infrared Characterization and Application) lab
The Mid-Infrared Characterization and Application (MICA) lab houses electro-optical systems to characterize fabricated infrared detectors and imagers. A probe station is used to measure current-voltage-temperature and capacitance-voltage-temperature response characteristics. A custom measurement setup is used to quantify the Quantum Efficiency (QE) and noise of detectors across the infrared spectrum. These quantitative characteristics allow the performance of research detectors to be compared against commercial state-of-the-art detectors. An integrated-circuit readout station is used to test infrared imagers after the integration of an infrared detector array onto a readout integrated circuit (ROIC). Our research explores advances in both the array and the ROIC. In addition, MICA contains open optical benches to support the integration and testing of infrared sensor systems. MICA is part of the Nanotech West user-facility.
News
NAMBE MBE Innovation Award
Congratulations to Dr. Sanjay Krishna for winning the prestigious MBE Innovation Award from the NAMBE 2022
Congratulations to our 2022 Graduates!
Congratulations to our 2022 KIND Lab Graduates including Sophie, Nathan, Kezia and Ji Hwan. We wish you all the best in your future endeavors. We are proud to have Sophie and Nathan continue their education with us at the KIND Lab for graduate school.
Newly minted Dr. Seunghyun Lee
Please join me in congratulating our newly minted, Dr. Seunghyun Lee. Seunghyun made an outstanding presentation and successfully defended his PhD dissertation on May 4, 2022. Seunghyun’s work has not only paved the way to advance the state of the art in LmAPDs, but also opened up several scientific questions that could be the basis of future PhD dissertations.
2022 ECE Faculty Awards
April 11th, 2022
Please, join me in congratulating Asimina, Hongping, Lisa and Sanjay for these fantastic achievements!!
- Asimina Kiourti, 2022 College of Engineering Dean’s Award for Distinguished Outreach Achievements
- Hongping Zhao, 2022 BEWEL Leadership in Innovation Award
- Lisa Fiorentini, 2022 Honda- Ohio State University Partnership Award
- Sanjay Krishna, 2022 Ralph L. Boyer Award for Excellence in Undergraduate Teaching Engineering Innovation
Undergraduate Research Posters
March 13th, 2022
Nathan Gajowski and Sophie Mills both created posters containing their research! Nathan's poster is on the left and Sophie's poster is on the right.
Nathan Gajowski Earns Denman Undergraduate Research Forum Award
March 10th, 2022
Congratulations to Nathan who has earned a Denman Undergraduate Research Forum Award! Dr. Krishna and Nathan attended the award ceremony at the Barrister Club in Columbus, Ohio.
Seunghyun Lee's Article on RA AlGaAsSb Published and Chosen for Editor's Pick
February 14th, 2022
Congratulations to Seunghyun and fellow contributors from the University of Virginia and the University of Illinois at Chicago for the publication of Random alloy thick AlGaAsSb avalanche photodiodes on InP substrates and it's being chosen for Editor's Pick!
New Project Awarded!
ALTITUDE: Affordable LIDAR Technologies for IntegraTion and Unmanned Deployment
November 11th, 2021
The project will address sensor needs in the commercial aerospace and defense/space markets by developing low cost, manufacturable, and miniaturized Flash LIDAR (i.e., imaging LIDAR) technologies that operate at 1.55 and 2 microns, which are currently unavailable commercially. Existing Flash LIDAR systems operating at short wavelengths (<1 micron) do not meet AFRL or NASA needs for long range, eye safe operation. Although these gaps can be addressed by operation at longer wavelengths, state of the art detector arrays operating at 1.55 and 2 micron are too large and costly for deployment on small air platforms. Recent advances in antimonide-based avalanche photodiode (APD) detectors can be leveraged to produce smaller, inexpensive, and manufacturable LIDAR receivers at 1.55 and 2 microns. Development of Flash LIDAR technologies at these wavelengths will help establish an Ohio-based supply chain with small business and large industry. We will engage student interns in all phases of the research as part of our efforts to train a high-tech workforce and establish Ohio as a leader in Flash LIDAR research and manufacturing.
Sponsor: Ohio Federal Research Network
Seunghyun Lee Wins the 2021 ECE Kraus Memorial Graduate Student Poster Competition
August 30, 2021
SeungHyun Lee was awarded first place in the 2021 ECE Kraus Memorial Graduate Student Poster Competition. His research, “Low noise AlGaAsSb avalanche photodiodes for eye-safe LiDAR applications," focuses on finding APD material allowing for longer LiDAR wavelength.
Mariah Schwartz Awarded DAGSI Fellowship
June 7, 2021
Mariah Schwartz has been awarded the Defense Associated Graduate Student Innovators (DAGSI) fellowship for three years. The DAGSI fellowship program partners Ohio graduate students in science and engineering with the Air Force Research Laboratory at Wright-Patterson Air Force Base on targeted areas of research.
Mariah's work will be focusing on 2 micron InGaAs/GaAsSb superlattice avalanche photodiodes on InP substrates for lidar applications. The avalanche photodiodes will implement separate absorption, charge and multiplication layers for optimal performance. Her primary work will be on the fabrication and characterization of the photodiodes.
Seunghyun Lee Awarded the Presidential Fellowship
May 10, 2021
Seunghyun Lee, Ph.D Candidate, in the KIND group won the Presidential Fellowship. This fellowship is considered the most competitive and prestigious scholarly recognition offered at the university. This will provides the opportunity and funds to devote full-time efforts to his dissertation research.
ECE Department Article on Seunghyun Lee.
Accelerator Award for LITE Detectors
May 07, 2020
Congratulations to Dr. Sanjay Krishna, graduate researcher Sri Harsha Kodati, Professor Wu Lu, and graduate researcher Vishank Talesara on being awarded an Accelerator Award to further develop the Lateral Interband Type-II Engineered Detectors (LITE Detectors)! Sri Harsha Kodati has been leading the effort to model and assess this detector, and now this team will work together to demonstrate a prototype and advance this concept towards commercialization.
The Accelerator Awards program grant of $100,000 will help develop this technology to the point that it is ready to be licensed by an Ohio-based startup company. The program is funded by the Ohio Third Frontier Technology Validation and Startup Fund (TVSF) and Ohio State and administered through the Corporate Engagement Office.
The Accelerator Awards program and the 2019-2020 awardees.
TJ Ronningen, NOGLSTP Board Member
April 12, 2019
KIND Research Scientist TJ Ronningen volunteers as a board member with the National Organization of Gay and Lesbian Scientists and Technical Professionals (NOGLSTP). In March, NOGLSTP hosted its Out To Innovate summit at the University of Southern California. At Out To Innovate, NOGLSTP invites lesbian, gay, bisexual, transgender, queer, and allied students and professionals in STEM to join for a weekend of networking, career development, and skill building. TJ attended the summit and organized NOGLSTP’s annual awards for the LGBTQ Educator, Engineer, and Scientist of the Year for 2019.
We're very proud to see members of our research group working for causes that are important to them as well as support minority involvement in the STEM fields. Thanks you, TJ, for setting an example for all of us to follow!
Teressa Specht Awarded DAGSI Fellowship
May 16, 2018
Congratulations to Teressa for winning the DAGSI fellowship.
Seunghuyn Lee Awarded Special Scholarships
May 1, 2018
We would like to congratulate Teressa Specht on receiving the prestigious Dayton Area Graduate Studies Institute (DAGSI) Fellowship and Seunghyun Lee on being granted a Special Scholarship.
Sen Mathews : International Scholar Research Exposition Reception 2017
November 17, 2017
Sen Mathews presented his poster in International Scholar Research Exposition Reception 2017 at OSU and, Dr. Sanjay Krishna and his colleges (Seunghyun and Vinita) also attended to celebrate him.
Sen Mathews said to Dr. Krishna that I appreciate the opportunity that you gave me. Dr. Krishna responded to Sen that "we just got started to be the first one in the world together".
Vinita Dahiya Earns iREDEFINE Awards
March 22, 2017
Congratulations to PhD student Vinita Dahiya who has earned the iREDEFINE awards!
ECE Team Awarded $3 Million to Advance Infrared Detector Technologies at Ohio State
March 1, 2017
Dr. Krishna's research group is awarded $3 Million to advance infrared detector technologies.
July KIND Group Social - Axe Throwing
July 27th, 2022
The KIND Lab had an "axe-cellent" time at Columbus Axe Throwing! We divided into two groups "Axiom" and "You're Axing for It" and played TIMBER and Tic-Tac-Toe, axe edition. Then it was time to find the best axe thrower in the group and Manisha came out on top! She appointed Chris to be the lumber-lord.
March KIND Group Social - Topgolf!
March 29th, 2022
The KIND group tried something new at Topgolf this month! Everyone had a lot of fun trying something new.
February KIND Group Social
February 24th, 2022
The KIND group gathered at the Chocolate Cafe in Columbus to spend time together with good food and drinks as well as celebrate the KIND Group's February Birthdays: Amber, Hyemin, and Kezia!
Winter Retreat 2022
January 27th and February 3rd, 2022
The KIND group and invited guests discussed current research projects and achievements. Each of the students presented their individual research and capstone projects.
KIND Group Social at Chocolate Cafe
November 1st, 2021
The KIND group had a social gathering for delicious food and drink at the local Chocolate Cafe in Columbus, Ohio.
KIND Winter Retreat
February 12th, 2021
The KIND Group hosted a winter retreat to recognize the accomplishments in 2020 and establish goals for 2021. Students Seunghyun Lee, Mariah Schwartz, Mridula Khade, Hyemin Jung, Sophie Mills, and Sri Harsha Kodati presented their work a large guest list including those working in industry, government, and at Ohio State.
KIND Ice Skating, 2020
February 26th, 2020
The KIND group practiced their ice skating skills once again!
KIND Winter Retreat, 2019
January 10, 2019
The KIND group had a winter retreat to finalize the progress made in 2018 and look ahead to launch 2019. Thanks to all the KIND members for your effort, performance, and improvement!
KIND Group Ice-Skating, Farewell Dave and Aashita
April 5, 2018
The KIND group went to the OSU ice rink together before hosting a farewell party for Dave and Aashita. We wish you both the best!
KIND Group at Bravo, Farewell Dr. Gustavo
January 23, 2018
Dr. Gustavo Vieira, who was a visiting scholar in KIND group, finished his 1 year-research about developing focal plane array (FPA) of InGaAs photodetector.
We gathered at BRAVO restaurant to have farewell party for him. We discussed the progress of his research a little bit and shared our feelings about how KIND group was with him for a year.
Thanks for being a part of KIND group and wish you much success in the future.
Kicking Off the New Year
January 8, 2018
The KIND group celebrated the New Year and our one year anniversary at Ohio State with three events.
First, a winter social consisting of a pizza party and a white elephant gift exchange. This exposed us to bacon wallets, wrinkles in time, and nonsensical Korean poetry.
Second, we had an all-day group retreat at the Columbus Metropolitan Library. Each group member presented on the progress made over the last six months as well as the exciting work ahead.
Finally, the KIND group celebrated a 2018 publication. Ali Kazemi is the lead author. Stephen Myers, Zahra Taghipour, Sen Mathews, Ted Schuler-Sandy, Seunghyun Lee, and Dr. Sanjay Krishna all contributed to this Infrared Physics & Technology article on a “mid-wavelength infrared unipolar nBp superlattice photodetector”.
Dr. Krishna's 1st Birthday at OSU
September 21, 2017
Happy Birthday Dr. Krishna!
Ohio State University Discovery Themes: Dr. Sanjay Krishna, ECE
March 10, 2017
Check out Ohio State's ECE youtube video on Dr. Sanjay Krishna.
Dr. Sanjay Krishna joins ECE team
March 1, 2017
Check out the ECE news article welcoming Dr. Sanjay Krishna to the ECE team!
Arman Mehzad
Undergraduate Student, Sophmore
Surith Krishna
Undergraduate Student, Freshman