Optofluidic integration of a photonic crystal nanolaser.
We demonstrate a new type of photonic crystal nanolaser incorporated into a microfluidic chip, which is fabricated by multilayer soft lithography. Experimentally, room-temperature continuous-wave lasing operation was achieved by integrating a photonic crystal nanocavity with a microfluidic unit, in which the flow medium both enhances the rate of heat removal and modulates the refractive index contrast. Furthermore, using the proposed system, dynamic modulation of the resonance wavelength and far-field radiation pattern can be achieved by introducing a bottom reflector across which various fluids with different refractive indices are forced to flow. In particular, by maintaining a gap between the reflector and the cavity equal to the emission wavelength, highly efficient unidirectional emission can be obtained. The proposed nanolasers are ideal platforms for highfidelity biological and chemical detection tools in micro-total-analytical or lab-on-a-chip systems.
Center for Integrated Optofluidic Systems, Department of Chemical and Biomolecular Engineering, KAIST, Daejeon 305-701, Korea. seheon@kaist.ac.kr, smyang@kaist.ac.kr
Se-Heon
SH
Kim
Jae-Hoon
JH
Choi
Seung-Kon
SK
Lee
Shin-Hyun
SH
Kim
Seung-Man
SM
Yang
Yong-Hee
YH
Lee
Christian
C
Seassal
Philippe
P
Regrency
Pierre
P
Viktorovitch
D000388:Air; D003198:Computer Simulation; D003461:Crystallography; D007834:Lasers; D049449:Luminescence; D044085:Microfluidics; D055095:Optics and Photonics; D017785:Photons; D012031:Refractometry; D013057:Spectrum Analysis; D013696:Temperature; D013997:Time Factors; D014867:Water
D014867:Water