SEED Threat Detection

The SEED methodology is a nonlinear THz application that forces a searched for material's secondary emission signal to rise above the background 'white noise' like a flare or, in military jargon, a 'Red Star Cluster.'

SEED - Stimulated Enhanced Emission Detection


In essence, a THz resonating harmonic frequency (2) (an 'external energy' excitation frequency) of the material (1) being searched for is transmitted.

If the material searched for is encountered by the transmitted excitation frequency, molecules of that material will be forced to absorb energy from the transmitted signal (3).

When the resonating THz frequency, or excitation energy, is removed, the molecules are forced to return to their lowest energy level...or ground state...and do so by releasing in all directions the absorbed excitation energy in what is called a 'secondary emission' (4)...a singularly unique spectral 'fingerprint' of relatively high energy that is based on the resonating THz frequency and the material's molecular absorption factors.




It is this secondary emission of explosive compositions that can be subsequently detected and identified from a standoff distance.SEED - Stimulated Enhanced Emission Detection

Dr. X. C. Zhang Letter


Based on sound, fundamental laws of physics, SEED is not just theory, it is achievable.

Furthermore, the SEED nonlinear excitation and secondary emission phenomena has been observed in a lab environment.

I can unequivocally state, "that the phenomenology required for success [of SEED] has been observed." I am comfortable in making such a statement for such an event recently occurred in our lab here at Rensselaer Polytechnic Institute where we observed THz re-emission from a target substance when stimulated with an intense THz pulse excitation. In fact, this observation is very similar to the prediction from ALVA Labs! Our recent observations of this experiment done by two of my students, Ms. Karen Ho and Mr. Xinke Wang, are available for your staff's edification upon request.

Dr. X.-C. Zhang
Letter dated Oct. 24, 2010

IEDs (Improvised Explosive Devices) and Suicide Bombers are the tools of terrorism and a scourge to civilized Society.

During Operation Iraqi Freedom and Operation Enduring Freedom, a total of 2,547 U.S. service member deaths were caused by IEDs, alone.

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In January 2015, a 10 year old girl in Nigeria was used as a suicide bomber to kill 20 people in a market while another male suicide bomber in Lebanon killed seven others in a Café.

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More recently, concerns have grown and security heightened at U.S. airports following the release on 24 December 2014 by al Qaeda in Yemen (AQAP) - believed to be the group behind the Charlie Hebdo attack in Paris on 7 January 2015 - of a magazine issue that featured instructions on how to build what AQAP called a "hidden bomb" from easily purchasable materials, as well as directions on how would-be lone wolves worldwide can evade airport security scanners and sniffer dogs. 

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Furthermore, since 17 January, there has been a spike in online threats made against airlines with over 50 threats being made. While none of the threats have proven credible, such threats do result in costly responses from a multitude of military, law enforcement and airport entities that greatly inconvenience and alarm travelers with jet fighter escorts, aircraft diversions, runway closures and even entire airports being shut down.

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And, now, ISIS and Al Qaeda are increasingly mounting and calling for attacks on soft targets as a means of deterring Western assaults on their strongholds -- a strategy that is extending the reach of terrorism to hotels, cafés, supermarkets and malls where Europeans and Americans once felt safe.

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Such concerns, threats and attacks must be stopped!

It is time now to mitigate, if not outright eliminate, these tools of terror and bring a sense of security back to Society.


ALVA Labs' US Patent for SEED issued 14 August 2012

ALVA Labs Patent SEED Patent: 15 Claims Accepted

Primary Claim 14 (Most critical) - A method to detect target materials, comprising the steps of: emitting electromagnetic radiation in the Terahertz range; modulating the electromagnetic radiation to excite molecules in the target materials; and detecting signature emissions of excited molecules in the target materials; wherein the target materials do not require sample preparation, and the steps of emitting, modulating and detecting are performed at a distance of at least 10 meters from the target materials.


NOTE: SEED Patent assignment has been changed from "Graziano" to "ALVA Labs LLC."

IED Suicide Bomber Detection

Stand Off Detection and identification of materials, including explosives, and other related chemicals and materials is one of the most pressing advantages of SEED Technologies.  Imagine explosives being detected at a distance, before they are close enough to cause loss of life.  The approaching car or truck can be scanned from a distance for explosives.  The vest packed with explosives identified from a distance.  This changes the terrorist threat.

Now imagine easily going through the airport, without the taking shoes off, emptying your pockets, or the long delays associated with today's security precautions.  This technology has military safety and commercial safety and security applications.  These are just a few.

Explosive compounds – such as Tetryl, RDX & PETN – fall within the THz spectrum and are, thus, susceptible to SEED excitation.

Explosive Spectrum


Database for Explosives


There are several Raman databases or spectral libraries in the open literature. Organic and inorganic explosives including precursors, chemical warfare agents including precursors, pesticides, narcotics, solvents, and naturally occurring toxins are some of the types of compounds tracked by the FBI Hazardous Materials Response Unit. Two libraries have been independently assembled for the FBI Hazardous Materials Response Unit's Raman projects and thus far total more than 450 compounds.


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