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We present mid-infrared photometry of three very young brown dwarfs locatedin the $\rho$ Ophiuchi star-forming region -- GY5, GY11 and GY310 --obtainedwith the Subaru 8-meter telescope. All three sources were detected at 8.6 and11.7$\mu$m, confirming the presence of significant mid-infrared excess arisingfrom optically thick dusty disks. The spectral energy distributions of bothGY310 and GY11 exhibit strong evidence of flared disks; flat disks can be ruledout for these two brown dwarfs. The data for GY5 show large scatter, and aremarginally consistent with both flared and flat configurations. Inner holes afew substellar radii in size are indicated in all three cases (and especiallyin GY11), in agreement with magnetospheric accretion models. Finally, our9.7$\mu$m flux for GY310 implies silicate emission from small grains on thedisk surface (though the data do not completely preclude larger grains with nosilicate feature). Our results demonstrate that disks around young substellarobjects are analogous to those girdling classical T Tauri stars, and exhibit asimilar range of disk geometries and dust properties.Comment: submitted to Astrophysical Journal Letter

Flared Disks and Silicate Emission in Young Brown Dwarfs