An analyte detector comprising - at least one substrate with a plurality of nano-antennas (11,12) configured to receive a target analyte with a spectral signature having absorption peaks (S1,S2) at different signature wavelengths (λ1,λ2); - a light source configured to provide source light with a source intensity over a source wavelength range (Λ0) including different source light wavelengths for interaction with the target analyte at the different signature wavelengths (λ1,λ2) according to the spectral signature; and - a light sensor for detecting a spectrum of the different source light wavelengths of the light having interacted with the target analyte at the different signature wavelengths (λ1,λ2) for determining the spectral signature of the target analyte; wherein the nano-antennas (11,12) comprise an antenna material (11m, 12m) forming resonant antenna structures configured to receive and resonantly interact with the source light to form a respective resonance peak (R1,R2) over a resonant wavelength range (Ω1,Ω2) overlapping a respective signature wavelength (λ1,λ2) of the target analyte, wherein the resonant interaction causes a locally concentrated field (Ec) of the source light in the resonant wavelength range (Λ1,Λ2), wherein the concentrated field (Ec) is localized around a respective target location (T1,T2) of the nano-antennas (11,12) and/or substrate; wherein the target location (T1,T2) is provided with a sorption material (11s, 12s) for sorbing the target analyte to provide a locally increased analyte concentration (Ac) of the target analyte coinciding with the locally concentrated field (Ec) of the source light for enhancing the interaction of the source light with the target analyte; wherein different nano-antennas (11,12) with the same sorption material (11s,12s) in their respective target locations (T1,T2) are configured to provide respective resonance peaks (R1,R2) in different resonant wavelength ranges (Λ1,Λ2) to overlap the different signature wavelengths (λ1,λ2) of the spectral signature, the analyte detector further comprising: - a spectrum analyzer for identifying the target analyte by its spectral signature in different resonant wavelength ranges. - at least one substrate with a plurality of nano-antennas (11,12) configured to receive a target analyte with a spectral signature having absorption peaks (S1,S2) at different signature wavelengths (λ1,λ2); - a light source configured to provide source light with a source intensity over a source wavelength range (Λ0) including different source light wavelengths for interaction with the target analyte at the different signature wavelengths (λ1,λ2) according to the spectral signature; and - a light sensor for detecting a spectrum of the different source light wavelengths of the light having interacted with the target analyte at the different signature wavelengths (λ1,λ2) for determining the spectral signature of the target analyte; wherein the nano-antennas (11,12) comprise an antenna material (11m, 12m) forming resonant antenna structures configured to receive and resonantly interact with the source light to form a respective resonance peak (R1,R2) over a resonant wavelength range (Ω1,Ω2) overlapping a respective signature wavelength (λ1,λ2) of the target analyte, wherein the resonant interaction causes a locally concentrated field (Ec) of the source light in the resonant wavelength range (Λ1,Λ2), wherein the concentrated field (Ec) is localized around a respective target location (T1,T2) of the nano-antennas (11,12) and/or substrate; wherein the target location (T1,T2) is provided with a sorption material (11s, 12s) for sorbing the target analyte to provide a locally increased analyte concentration (Ac) of the target analyte coinciding with the locally concentrated field (Ec) of the source light for enhancing the interaction of the source light with the target analyte; wherein different nano-antennas (11,12) with the same sorption material (11s,12s) in their respective target locations (T1,T2) are configured to provide respective resonance peaks (R1,R2) in different resonant wavelength ranges (Λ1,Λ2) to overlap the different signature wavelengths (λ1,λ2) of the spectral signature, wherein the nano-antennas (11,12) comprise an antenna material (11m, 12m) forming resonant antenna structures configured to receive and resonantly interact with the source light to form a respective resonance peak (R1,R2) over a resonant wavelength range (Ω1,Ω2) overlapping a respective signature wavelength (λ1,λ2) of the target analyte, wherein the resonant interaction causes a locally concentrated field (Ec) of the source light in the resonant wavelength range (Λ1,Λ2), wherein the concentrated field (Ec) is localized around a respective target location (T1,T2) of the nano-antennas (11,12) and/or substrate; wherein the target location (T1,T2) is provided with a sorption material (11s, 12s) for sorbing the target analyte to provide a locally increased analyte concentration (Ac) of the target analyte coinciding with the locally concentrated field (Ec) of the source light for enhancing the interaction of the source light with the target analyte; wherein different nano-antennas (11,12) with the same sorption material (11s,12s) in their respective target locations (T1,T2) are configured to provide respective resonance peaks (R1,R2) in different resonant wavelength ranges (Λ1,Λ2) to overlap the different signature wavelengths (λ1,λ2) of the spectral signature, - a spectrum analyzer for identifying the target analyte by its spectral signature in different resonant wavelength ranges.