Laser Detection of Explosives

Dr. Tong's laser sensor detects chemicals in explosives and dirty bombs at a resolution of micrograms per square centimeter.

Invented multi-photon optical methods based on laser wave mixing and dynamic laser gratings can sense chemicals used in explosives, dirty bombs, and other destructive weapons. A rugged, solidstate prototype with a footprint of one cubic foot detects chemicals such as cesium and TNT at groundbreaking sensitivities and selectivities.

After decades of research sponsored by defense contractors and federal agencies including NIH, NSF, and DHS, laser and optical technology have progressed to enable compact, affordable, durable, and commercial-ready detectors relying on Dr. Tong's methods. Because the technology relies on optical methods, the sensor can detect any chemical with a unique spectroscopic signature.

In a recently completed SBIR Phase II project funded by DHS to facilitate commercialization, the Johns Hopkins University Applied Physics Laboratory verified the sensor's ability to provide standoff detection at resolutions exceeding one microgram per square centimeter.

With today's threats to national security, no major border crossing, airport, checkpoint, or commercial hub is complete without Dr. Tong's explosive detection technology.

Dr. Tong's laser technology can also detect biomarkers for early disease detection and biological sample analysis: learn more here. 

Benefits

• Near single-molecule detection
• Low energy requirements
• Rugged, mobile prototype with footprint of one cubic foot
• Real-time sample analysis Low-cost due to advancements in laser diode technology
• Collects nearly 100% of signal (unlike Raman spectroscopy and fluorescence)

Detect Chemicals in Explosives

• TNT
• Cesium used in dirty bombs
• Any chemical compound with a unique spectroscopic signature

 

Lead Inventor

Bill Tong

Issued and Pending Patents

• US 8,268,551

• US 9,244,005

• WO 2017/143347