Human hand as a powerless and multiplexed infrared light source for information decryption and complex signal...

Area of Science:

• Human-computer interaction
• Biomedical engineering
• Sustainable technology

Background:

• Intelligent systems increasingly integrate human components for enhanced compatibility.
• Existing infrared (IR) light sources require external power and lack inherent controllability.
• The human hand naturally emits spontaneous infrared radiation.

Purpose of the Study:

• To explore the integration of the human hand as a powerless, multiplexed IR light source in functional systems.
• To leverage the hand's unique properties for sustainable and controllable system design.
• To demonstrate novel applications in encryption, signal generation, and sign language recognition.

Main Methods:

• Utilizing the spontaneous infrared radiation from the human hand and its individual fingers.
• Employing selective diffraction gratings to multiplex IR signals from different fingers.
• Integrating the hand as an IR source into encryption/decryption, signal generation, and sign language recognition systems.

Main Results:

• The human hand serves as a sustainable, power-free IR light source with inherent controllability.
• Multiplexed IR signals can be generated using individual fingers and diffracted by gratings.
• Successful demonstration of unclonable, multilevel encryption/decryption, complex signal generation, and accurate sign language recognition.

Conclusions:

• The human hand offers a sustainable and controllable alternative to engineered IR light sources.
• Integration of the hand as an IR source advances human-compatible intelligent systems.
• This approach reduces power consumption and enhances system intelligence and control.