An integrated continuous-wave terahertz biosensor

Mohammad Neshat; Daryoosh Saeedkia; Ramin Sabry; Safieddin Safavi-Naeini

doi:10.1117/12.718619

4 May 2007 An integrated continuous-wave terahertz biosensor

Mohammad Neshat, Daryoosh Saeedkia, Ramin Sabry, Safieddin Safavi-Naeini

Proceedings Volume 6549, Terahertz for Military and Security Applications V; 65490E (2007) https://doi.org/10.1117/12.718619
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

An integrated continuous-wave (CW) terahertz biosensor is proposed based on an edge-coupled terahertz photomixer source with guided-wave optical excitation scheme. In this device, two laser beams are guided inside an optical dielectric waveguide structure and being gradually absorbed by an overlying ultra-fast photoabsorbing layer, wherein a terahertz signal is generated due to photomixing phenomenon. The generated THz signal is guided by a coplanar-stripline (CPS) and is coupled to an integrated CPS resonator, which acts as a sample carrier and transducer. After interaction by bio-sample, terahertz wave is guided by a CPS line to a wide-band antenna and is detected by a THz power detector. Our performance analysis for the proposed CW terahertz biosensor supports the feasibility of the whole idea very well. The proposed device is attractive for system-on-a-chip terahertz sensors and spectrometers.

Citation Download Citation

Mohammad Neshat, Daryoosh Saeedkia, Ramin Sabry, and Safieddin Safavi-Naeini "An integrated continuous-wave terahertz biosensor", Proc. SPIE 6549, Terahertz for Military and Security Applications V, 65490E (4 May 2007); https://doi.org/10.1117/12.718619

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